CN111343694B - Information transmission method, user equipment and base station - Google Patents

Abstract

The embodiment of the invention provides an information transmission method, which comprises the following steps: the network equipment sends a synchronization signal and sends resource indication information and bandwidth information to user equipment, wherein the resource indication information is used for indicating the position relation between the actual access resource where the synchronization signal is located and the resource where the current cell is located, and the bandwidth information is the bandwidth information of the current cell; the position relationship between the actual access resource where the synchronization signal is located and the resource where the current cell is located is the frequency range distance of the resource location of the actual access resource relative to the lowest frequency location of the resource where the current cell is located. Through the indication of the resource indication information, the interference influence on the access of the user equipment caused by the intensive cell is avoided to a certain extent, and the detection performance of the common control channel is improved.

Description

Information transmission method, user equipment and base station

Technical Field

The present invention relates to the field of communications, and in particular, to a method, a user equipment and a base station for information transmission.

Background

In release 10 and previous releases of a Long Term Evolution (LTE) system, a flow of accessing a UE to the LTE system is to detect a PSS first and then detect an SSS according to a time domain position relationship between the PSS and the SSS, so as to achieve time-frequency initial synchronization, including symbol, subframe, and frame synchronization; the physical cell identification can be obtained through the detected sequence combination of the PSS and the SSS, and the cyclic prefix length and the like are determined through the time interval of the PSS and the SSS; then, the CRS can be determined to measure the cell, if the measurement result is better, the system message can be read continuously, and a Physical Broadcast Channel (PBCH) is read first to obtain the downlink system bandwidth, CRS antenna port, system frame number, PHICH configuration information, and the like; reading a system information block type 1 (SIB 1), and reading other SIBs according to the configuration of the SIB1, wherein the SIB1 is a broadcast message carried on broadcast channel resources; under the above premise, if there is a service to be transmitted, it is able to send random access to establish a radio link connection with the base station, and then it is able to perform normal data transmission.

However, when the deployment of the base station, especially the deployment of the micro base station is dense, in the synchronization system, the interference between the cells governed by each micro base station is very serious, which causes difficulty in reading the common control channel of the cell by the UE and even incapability of obtaining the common control channel.

Disclosure of Invention

The information transmission method, the user equipment and the base station can coordinate inter-cell interference of the common control channel and improve the detection performance of the common control channel.

In a first aspect, a method for acquiring a cell access resource is provided, where the method includes: the method comprises the steps that User Equipment (UE) determines at least one candidate sequence of a synchronization signal of an access cell of the UE and a plurality of candidate access resources of the access cell, wherein each candidate access resource in the candidate access resources has a corresponding position relation with a resource where the access cell is located, and any candidate sequence in the candidate access resources corresponds to one of the candidate access resources; the UE detecting the synchronization signal according to the at least one candidate sequence; and the UE determines the resource position of the actual access resource corresponding to the detected actual sequence in the access cell according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources, wherein the actual sequence is one of the candidate sequences, and the actual access resource is one of the candidate access resources.

With reference to the first aspect, in a first possible implementation manner, the determining, by the UE, a resource position of an actual access resource in the access cell corresponding to a detected actual sequence according to a position relationship between each candidate access resource in the candidate access resources and a resource of the access cell and a corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources is specifically implemented as: the UE determines an actual access resource corresponding to the actual sequence from the candidate access resources; and the UE determines the resource position of the actual access resource in the access cell according to the position relation between the candidate access resources and the resource of the access cell.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the method is specifically implemented as: the candidate sequence is a complete sequence; or the candidate sequence is a fragment sequence of the complete sequence.

With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in a third possible implementation manner, the method is specifically implemented as: at least one candidate access resource except for a first candidate access resource exists in the candidate access resources, the first candidate access resource is a resource with the frequency domain width of N resource blocks in the center of the access cell, and N is a pre-configured natural number.

With reference to the first aspect or any one of the first possible implementation manner to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, after the UE determines, according to a position relationship between each candidate access resource of the multiple candidate access resources and a resource of the access cell and a correspondence between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource corresponding to a detected actual sequence in the access cell, the method further includes: and the UE determines the position of the central frequency point of the access cell according to the resource position of the actual access resource in the access cell.

With reference to the first aspect or any one of the first possible implementation manner of the first aspect to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, after the UE determines, according to a position relationship between each candidate access resource of the multiple candidate access resources and a resource of the access cell, and a correspondence between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource corresponding to a detected actual sequence in the access cell, the method further includes: the UE receives a broadcast channel of the access cell, wherein the broadcast channel carries bandwidth indication information of the access cell; and the UE determines the bandwidth of the access cell according to the bandwidth indication information.

With reference to the first aspect or any one of the first possible implementation manner of the first aspect to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, after the UE determines, according to a position relationship between each candidate access resource of the multiple candidate access resources and a resource of the access cell and a correspondence between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource in the access cell corresponding to the detected actual sequence, the method further includes: if the actual access resource comprises a first actual access resource and a second actual access resource, the UE respectively acquires a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

With reference to the first aspect or any one of the first possible implementation manner of the first aspect to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, after the UE determines, according to a position relationship between each candidate access resource of the multiple candidate access resources and a resource of the access cell and a corresponding relationship between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource in the access cell corresponding to the detected actual sequence, the method further includes: the UE determines a second reference signal on the resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and intercepted from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or, the UE determines a second reference signal at a resource position of the actual access resource, where the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, a reference signal in a bandwidth of the access cell is a cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking a number of resource blocks included in the bandwidth of the access cell as a frequency domain width.

With reference to the first aspect or any one possible implementation manner of the first aspect to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, after the UE determines, according to a position relationship between each candidate access resource of the multiple candidate access resources and a resource of the access cell and a corresponding relationship between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource in the access cell corresponding to the detected actual sequence, the method further includes: and if the resource position of the actual access resource is not the frequency domain center position of the access cell, the UE treats the subcarrier in the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

In a second aspect, a method for indicating cell access resources is provided, where the method includes: determining an actual access resource of a current cell and an actual sequence of a synchronization signal of the current cell, wherein the actual access resource is at least one candidate access resource of a plurality of candidate access resources used by the current cell for transmitting the synchronization signal, the actual sequence is one of the at least one candidate sequence of the synchronization signal, and any one of the at least one candidate sequence corresponds to one of the candidate access resources; the synchronization signal is transmitted in the actual sequence on the actual access resource.

With reference to the second aspect, in a first possible implementation manner, the method specifically includes: one of the at least one candidate sequence is a complete sequence; or one of the at least one candidate sequence is a fragment sequence of the complete sequence.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the implementation manner is specifically that: at least one candidate access resource other than the first candidate access resource exists in the candidate access resources, the first candidate access resource is a resource with the frequency domain width of the central N resource blocks of the current cell, and N is a pre-configured natural number.

With reference to the second aspect or the first possible implementation manner of the second aspect or the second possible implementation manner of the second aspect, in a third possible implementation manner, the method further includes: and sending a broadcast channel in the current cell, wherein the broadcast channel carries bandwidth indication information of the current cell, and the bandwidth indication information of the current cell is used for indicating the bandwidth of the current cell.

With reference to the second aspect or any possible implementation manner of the first possible implementation manner of the second aspect to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, after the synchronization signal is transmitted in the actual sequence on the actual access resource, the method further includes: and if the actual access resource comprises a first actual access resource and a second actual access resource, sending a first random access configuration of the current cell on a broadcast channel resource or a common channel resource corresponding to the first actual access resource, and sending a second random access configuration of the current cell on a broadcast channel resource or a common channel resource corresponding to the second actual access resource.

With reference to the second aspect or any possible implementation manner of the first possible implementation manner of the second aspect to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, after the synchronization signal is transmitted in the actual sequence on the actual access resource, the method further includes: sending a second reference signal at the resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and truncated from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the frequency domain width; or sending a second reference signal at the resource position of the actual access resource, where the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal within the bandwidth of the current cell is a cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

With reference to the second aspect or any one possible implementation manner of the first possible implementation manner of the second aspect to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner, the determining the actual access resource of the current cell is specifically implemented as: and if the resource position of the actual access resource is not in the frequency domain center position of the current cell, treating the subcarrier in the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

In a third aspect, a method for acquiring cell access resources is provided, where the method includes: user Equipment (UE) determines at least one candidate sequence of a synchronization signal of an access cell of the UE and a plurality of candidate access resources of the access cell; the UE detecting the synchronization signal according to the at least one candidate sequence; the UE receives a broadcast channel of the access cell on a broadcast channel resource corresponding to an actual access resource where the synchronization signal is detected, wherein the actual access resource is one of the candidate access resources, the broadcast channel carries resource indication information, and the resource indication information is used for indicating the actual access resource in the candidate access resources or indicating the position relationship between the actual access resource and the resource where the access cell is located; and the UE determines the resource position of the actual access resource in the access cell according to the resource indication information.

With reference to the third aspect, in a first possible implementation manner, when the resource indication information is used to indicate an actual access resource in the multiple candidate access resources, each candidate access resource in the multiple candidate access resources has a corresponding location relationship with a resource in which the access cell is located. At this time, the UE determines the resource location of the actual access resource in the access cell according to the resource indication information, specifically: the UE determines actual access resources in the candidate access resources according to the resource indication information; and the UE determines the resource position of the actual access resource in the access cell according to the corresponding position relation between each candidate access resource in the candidate access resources and the resource of the access cell.

With reference to the third aspect, in a second possible implementation manner, when the resource indication information is used to indicate a location relationship between the actual access resource and a resource of the access cell, the determining, by the UE, a resource location of the actual access resource in the access cell according to the resource indication information is specifically implemented as: and the UE determines the resource position of the actual access resource in the access cell according to the position relationship between the actual access resource and the resource of the access cell indicated by the resource indication information.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner, after the UE determines, according to the resource indication information, a resource location of the actual access resource in the access cell, the method further includes: and the UE determines the cell identification of the access cell according to the resource position of the actual access resource in the access cell and the actual sequence of the detected synchronous signal.

With reference to the third aspect or any possible implementation manner of the first possible implementation manner of the third aspect to the third possible implementation manner of the third aspect, in a fourth possible implementation manner, after the UE determines, according to the resource indication information, a resource location of the actual access resource in the access cell, the method further includes: if the actual access resource comprises a first actual access resource and a second actual access resource, the UE respectively acquires a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

With reference to the third aspect or any possible implementation manner of the first possible implementation manner of the third aspect to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner, the method is specifically implemented as: after the UE determines the resource location of the actual access resource in the access cell according to the resource indication information, the method further includes:

the UE determines a second reference signal at a resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and truncated from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or, the UE determines a second reference signal at a resource position of the actual access resource, where the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

With reference to the third aspect or any possible implementation manner of the first possible implementation manner of the third aspect to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner, the method further includes: and if the resource position of the actual access resource is not the frequency domain center position of the access cell, the UE treats the subcarrier in the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner, the method is specifically implemented as: the broadcast channel resource corresponding to the actual access resource is the resource on one side predefined by the central frequency point of the actual access resource.

In a fourth aspect, a method for indicating cell access resources is provided, where the method includes: determining an actual access resource of a current cell and an actual sequence of a synchronization signal of the current cell, wherein the actual access resource is at least one candidate access resource in a plurality of candidate access resources of the current cell, and the actual sequence is one of the at least one candidate sequence of the synchronization signal; transmitting the synchronization signal of the current cell in the actual sequence on the actual access resource; and sending a broadcast channel on a broadcast channel resource corresponding to the actual access resource, wherein the broadcast channel carries resource indication information, and the resource indication information is used for indicating the actual access resource in the candidate access resources or indicating the position relationship between the actual access resource and the resource of the current cell.

With reference to the fourth aspect, in a first possible implementation manner, the method specifically includes: the resource location of the actual access resource in the current cell and the actual sequence of the synchronization signal are also used to represent the cell identity of the current cell.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, after the broadcast channel is sent on the broadcast channel resource corresponding to the actual access resource, the method further includes: if the actual access resource comprises a first actual access resource and a second actual access resource, respectively sending a first random access configuration and a second random access configuration on a broadcast channel resource or a common channel resource corresponding to the first actual access resource and a broadcast channel resource or a common channel resource corresponding to the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner, after the broadcast channel is sent on the broadcast channel resource corresponding to the actual access resource, the method further includes: sending a second reference signal at the resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and truncated from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the frequency domain width; or sending a second reference signal at the resource position of the actual access resource, where the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal within the bandwidth of the current cell is a cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

With reference to the fourth aspect or any one possible implementation manner of the first possible implementation manner of the fourth aspect to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the determining an actual access resource of the current cell is specifically implemented as: and if the resource position of the actual access resource is not the frequency domain center position of the current cell, treating the subcarrier of the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the method is specifically implemented as: the broadcast channel resource corresponding to the actual access resource is the resource on one side predefined by the central frequency point of the actual access resource.

In a fifth aspect, a user equipment is provided, where the user equipment includes: a determining unit, configured to determine at least one candidate sequence of a synchronization signal of an access cell of the ue and multiple candidate access resources of the access cell, where each candidate access resource in the multiple candidate access resources has a corresponding location relationship with a resource in which the access cell is located, and any candidate sequence in the at least one candidate sequence corresponds to one of the multiple candidate access resources; a detecting unit, configured to detect the synchronization signal according to the at least one candidate sequence; the determining unit is further configured to determine, according to a positional relationship between each candidate access resource of the multiple candidate access resources and the resource in which the access cell is located and a correspondence between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource corresponding to the detected actual sequence in the access cell, where the actual sequence is one of the at least one candidate sequence, and the actual access resource is one of the multiple candidate access resources.

With reference to the fifth aspect, in a first possible implementation manner, the method specifically includes: the determining unit is specifically configured to determine, according to a positional relationship between each candidate access resource of the multiple candidate access resources and the resource of the access cell and a corresponding relationship between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource in the access cell corresponding to the detected actual sequence, where the actual access resource corresponds to the detected actual sequence, where the determining unit is configured to: determining an actual access resource corresponding to the actual sequence from the plurality of candidate access resources; and determining the resource position of the actual access resource in the access cell according to the position relation of the candidate access resources and the resource of the access cell.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the method specifically includes: the candidate sequence is a complete sequence; or the candidate sequence is a fragment sequence of the complete sequence.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect or the second possible implementation manner of the fifth aspect, in a third possible implementation manner, the method is specifically implemented as: at least one candidate access resource except for a first candidate access resource exists in the candidate access resources, the first candidate access resource is a resource with the frequency domain width of N resource blocks in the center of the access cell, and N is a pre-configured natural number.

With reference to the fifth aspect or any one possible implementation manner of the first possible implementation manner of the fifth aspect to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the determining unit is further configured to determine the position of the center frequency point of the access cell according to the resource position of the actual access resource in the access cell.

With reference to the fifth aspect or any possible implementation manner of the first possible implementation manner of the fifth aspect to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner, the user equipment further includes a receiving unit, configured to receive a broadcast channel of the access cell, where the broadcast channel carries bandwidth indication information of the access cell; the determining unit is further configured to determine the bandwidth of the access cell according to the bandwidth indication information.

With reference to the fifth aspect or any possible implementation manner of the first possible implementation manner of the fifth aspect to the fourth possible implementation manner of the fifth aspect, in a sixth possible implementation manner, the user equipment further includes a receiving unit, configured to, if the actual access resource includes a first actual access resource and a second actual access resource, respectively obtain a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, where the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

With reference to the fifth aspect or any possible implementation manner of the first possible implementation manner of the fifth aspect to the sixth possible implementation manner of the fifth aspect, in a seventh possible implementation manner, the determining unit is further configured to determine a second reference signal in a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

With reference to the fifth aspect or any one of the first possible implementation manner to the seventh possible implementation manner of the fifth aspect, in an eighth possible implementation manner, if the resource location of the actual access resource is not the frequency domain center location of the access cell, the determining unit is further configured to treat a subcarrier in the actual access resource center as a virtual direct current subcarrier when determining resource block division within the actual access resource.

In a sixth aspect, a base station is provided, which includes: a determining unit, configured to determine an actual access resource of a current cell under a base station and an actual sequence of a synchronization signal of the current cell, where the actual access resource is at least one candidate access resource among multiple candidate access resources used by the current cell to transmit the synchronization signal, the actual sequence is one of the at least one candidate sequence of the synchronization signal, and any one of the at least one candidate sequence corresponds to one of the multiple candidate access resources; a sending unit, configured to send the synchronization signal in the actual sequence on the actual access resource.

With reference to the sixth aspect, in a first possible implementation manner, the method specifically includes: one of the at least one candidate sequence is a complete sequence; or one of the at least one candidate sequence is a fragment sequence of the complete sequence.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the method is specifically implemented as: at least one candidate access resource other than the first candidate access resource exists in the candidate access resources, the first candidate access resource is a resource with the frequency domain width of the central N resource blocks of the current cell, and N is a pre-configured natural number.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect or the second possible implementation manner of the sixth aspect, in a third possible implementation manner, the sending unit is further configured to send a broadcast channel in the current cell, where the broadcast channel carries bandwidth indication information of the current cell, and the bandwidth indication information of the current cell is used to indicate a bandwidth of the current cell.

With reference to the sixth aspect or any one possible implementation manner of the first possible implementation manner of the sixth aspect to the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner, the sending unit is further configured to send, if the actual access resource includes a first actual access resource and a second actual access resource, the first random access configuration of the current cell on the broadcast channel resource or the common channel resource corresponding to the first actual access resource, and send the second random access configuration of the current cell on the broadcast channel resource or the common channel resource corresponding to the second actual access resource.

With reference to the sixth aspect or any possible implementation manner of the first possible implementation manner of the sixth aspect to the fourth possible implementation manner of the sixth aspect, in a fifth possible implementation manner, the sending unit is further configured to send a second reference signal on a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of a frequency domain; or, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

With reference to the sixth aspect or any possible implementation manner of the first possible implementation manner of the sixth aspect to the fifth possible implementation manner of the sixth aspect, in a sixth possible implementation manner, the determining unit is specifically configured to: and if the resource position of the actual access resource is not in the frequency domain center position of the current cell, treating the subcarrier in the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

In a seventh aspect, a user equipment is provided, where the user equipment includes: a determining unit, configured to determine at least one candidate sequence of a synchronization signal of an access cell and a plurality of candidate access resources of the access cell; a detecting unit, configured to detect the synchronization signal according to the at least one candidate sequence; a receiving unit, configured to receive a broadcast channel of the access cell on a broadcast channel resource corresponding to an actual access resource where the synchronization signal is detected, where the actual access resource is one of the multiple candidate access resources, and the broadcast channel carries resource indication information, where the resource indication information is used to indicate an actual access resource in the multiple candidate access resources, or the resource indication information is used to indicate a position relationship between the actual access resource and a resource where the access cell is located; the determining unit is further configured to determine a resource location of the actual access resource in the access cell according to the resource indication information.

With reference to the seventh aspect, in a first possible implementation manner, when the resource indication information is used to indicate an actual access resource in the multiple candidate access resources, each candidate access resource in the multiple candidate access resources has a corresponding location relationship with a resource where the access cell is located. At this time, when the determining unit is configured to determine the resource location of the actual access resource in the access cell according to the resource indication information, the determining unit is specifically configured to: determining actual access resources in the candidate access resources according to the resource indication information; and determining the resource position of the actual access resource in the access cell according to the corresponding position relation between each candidate access resource in the candidate access resources and the resource of the access cell.

With reference to the seventh aspect, in a second possible implementation manner, when the resource indication information is used to indicate a location relationship between the actual access resource and a resource of the access cell, the determining unit is specifically configured to determine, according to the resource indication information, a resource location of the actual access resource in the access cell, and the determining unit is configured to: and determining the resource position of the actual access resource in the access cell according to the position relationship between the actual access resource and the resource of the access cell indicated by the resource indication information.

With reference to the seventh aspect or the first possible implementation manner of the seventh aspect or the second possible implementation manner of the seventh aspect, in a third possible implementation manner, the method is specifically implemented as: the determining unit is further configured to determine a cell identifier of the access cell according to the resource location of the actual access resource in the access cell and the actual sequence of the detected synchronization signal.

With reference to the seventh aspect or any one possible implementation manner of the first possible implementation manner to the third possible implementation manner of the seventh aspect, in a fourth possible implementation manner, the method is specifically implemented as: the receiving unit is further configured to, if the actual access resource includes a first actual access resource and a second actual access resource, respectively obtain a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, where the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

With reference to the seventh aspect or any possible implementation manner of the first possible implementation manner to the fourth possible implementation manner of the seventh aspect, in a fifth possible implementation manner, the method is specifically implemented as: the determining unit is further configured to determine a second reference signal at a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

With reference to the seventh aspect or any one possible implementation manner of the first possible implementation manner to the fifth possible implementation manner of the seventh aspect, in a sixth possible implementation manner, the method is specifically implemented as: the determining unit is further configured to treat a subcarrier in the center of the actual access resource as a virtual direct current subcarrier when determining the resource block division within the actual access resource, if the resource location of the actual access resource is not the frequency domain center location of the access cell.

With reference to the sixth possible implementation manner of the seventh aspect, in a seventh possible implementation manner, the method is specifically implemented as: the broadcast channel resource corresponding to the actual access resource is the resource on one side predefined by the central frequency point of the actual access resource.

In an eighth aspect, a base station is provided, which includes: a determining unit, configured to determine an actual access resource of a current cell under a base station and an actual sequence of a synchronization signal of the current cell, where the actual access resource is at least one candidate access resource in multiple candidate access resources of the current cell, and the actual sequence is one of the at least one candidate sequence of the synchronization signal; a sending unit, configured to send the synchronization signal of the current cell in the actual sequence on the actual access resource; the sending unit is further configured to send a broadcast channel on a broadcast channel resource corresponding to the actual access resource, where the broadcast channel carries resource indication information, and the resource indication information is used to indicate an actual access resource in the multiple candidate access resources, or the resource indication information is used to indicate a location relationship between the actual access resource and a resource where the current cell is located.

With reference to the eighth aspect, in a first possible implementation manner, the method specifically includes: the resource location of the actual access resource in the current cell and the actual sequence of the synchronization signal are also used to represent the cell identity of the current cell.

With reference to the eighth aspect or the first possible implementation manner of the eighth aspect, in a second possible implementation manner, the sending unit is further configured to: if the actual access resource comprises a first actual access resource and a second actual access resource, respectively sending a first random access configuration and a second random access configuration on a broadcast channel resource or a common channel resource corresponding to the first actual access resource and a broadcast channel resource or a common channel resource corresponding to the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

With reference to the eighth aspect or the first possible implementation manner of the eighth aspect or the second possible implementation manner of the eighth aspect, in a third possible implementation manner, the sending unit is further configured to send a second reference signal on a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of a frequency domain; or, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

With reference to the eighth aspect or any possible implementation manner of the first possible implementation manner of the eighth aspect to the third possible implementation manner of the eighth aspect, in a fourth possible implementation manner, the determining unit is specifically configured to: and if the resource position of the actual access resource is not the frequency domain center position of the current cell, treating the subcarrier of the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

With reference to the fourth possible implementation manner of the eighth aspect, in a fifth possible implementation manner, the method is specifically implemented as: the broadcast channel resource corresponding to the actual access resource is the resource on one side predefined by the central frequency point of the actual access resource.

According to the information transmission method, the user equipment and the base station, the resource position of the resource of the actual access resource in the access cell is determined through the position relation between the candidate access resource and the resource of the access cell and the detected actual sequence of the synchronous signal, so that the interference influence on the access of the UE caused by the intensive cell can be avoided to a certain extent, the inter-cell interference of the common control channel is coordinated, and the detection performance of the common control channel is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of a method for acquiring cell access resources according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a location relationship between a cell carrier and a candidate access resource according to an embodiment of the present invention.

Fig. 3 is a diagram illustrating a relationship between a reference signal and a cell carrier according to an embodiment of the present invention.

Fig. 4 is a diagram illustrating another relationship between a reference signal and a cell carrier according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of positions of dc subcarriers in carrier centers and non-carrier centers according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of the relationship between the dc subcarriers of the candidate access resources in the carrier center and the non-carrier center.

Fig. 7 is a flowchart of a method for indicating cell access resources according to an embodiment of the present invention.

Fig. 8 is a flowchart of another method for acquiring cell access resources according to an embodiment of the present invention.

Fig. 9 is a flowchart of another method for indicating cell access resources according to an embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.

Fig. 13 is a schematic structural diagram of another base station according to an embodiment of the present invention.

Fig. 14 is a schematic structural diagram of a user equipment according to still another embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a base station according to another embodiment of the present invention.

Fig. 16 is a schematic structural diagram of a user equipment according to still another embodiment of the present invention.

Fig. 17 is a schematic structural diagram of a base station according to another embodiment of the present invention;

FIG. 18 is a diagram illustrating a method for determining a reference signal sequence according to an embodiment of the invention;

fig. 19 is a schematic diagram of another reference signal sequence determination method according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention can be applied to various communication systems, such as: global System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), and the like.

User Equipment (UE), also referred to as Mobile Terminal (Mobile Terminal), Mobile User Equipment (ms), etc., may communicate with one or more core networks via a Radio Access Network (e.g., RAN), and may be Mobile terminals, such as Mobile phones (or "cellular" phones) and computers having Mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted Mobile devices, that exchange language and/or data with the Radio Access Network.

The Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, or an evolved Node B (eNB or e-NodeB) in LTE, but the present invention is not limited thereto, and for convenience of description, the following embodiments take eNB as an example for explanation.

Fig. 1 is a flowchart of a method for acquiring cell access resources according to an embodiment of the present invention. The method of fig. 1 is performed by a UE.

101, a UE determines at least one candidate sequence of a synchronization signal of an access cell of the UE and a plurality of candidate access resources of the access cell.

Wherein each candidate access resource in the candidate access resources has a corresponding position relation with the resource where the access cell is located, and any candidate sequence in the at least one candidate sequence corresponds to one of the candidate access resources.

In the embodiment of the present invention, the relative position relationship between the candidate access resource and the resource of the access cell may be a frequency range distance between the resource position of the candidate access resource and the center frequency point position of the access cell, or a frequency range distance between the resource position of the candidate access resource and the low frequency position of the access cell, or a frequency range distance between the resource position of the candidate access resource and the high frequency position of the access cell.

102, the UE detects the synchronization signal according to the at least one candidate sequence.

103, the UE determines the resource position of the actual access resource corresponding to the detected actual sequence in the access cell according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources.

Wherein the actual sequence is one of the at least one candidate sequence, and the actual access resource is one of the candidate access resources.

In the embodiment of the invention, the resource position of the resource of the actual access resource in the access cell is determined by the position relation of the candidate access resource and the resource of the access cell and the detected actual sequence of the synchronous signal, so that the interference influence on the access of the UE caused by the cell concentration can be avoided to a certain extent, the inter-cell interference of the common control channel is coordinated, and the detection performance of the common control channel is improved.

In addition, the actual access resource is determined through the sequence detection of the synchronous signal, and the synchronous signal detection is the first step of carrier discovery of the UE, so that the UE can determine the access resource at the earliest, and does not need to further read other messages, such as a broadcast channel, to determine the access resource for other signals on the resource, such as a reference signal for measurement and the like, thereby simplifying the steps of system discovery and access, and also not needing to read the broadcast message when measurement is performed, thereby improving the time efficiency and the power efficiency.

Optionally, step 103 may be specifically implemented as: the UE determines an actual access resource corresponding to the actual sequence from the candidate access resources; and the UE determines the resource position of the actual access resource in the access cell according to the position relation between the candidate access resources and the resource of the access cell.

Alternatively, the candidate sequence may be a complete sequence, or the candidate sequence may be a fragment sequence of a complete sequence.

Optionally, there is at least one candidate access resource in the plurality of candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the access cell, where N is a pre-configured natural number, for example, N is equal to 6. In addition, N may be specified by a protocol, or according to an operator's policy.

Optionally, after step 103, the method further comprises: and the UE determines the position of the central frequency point of the access cell according to the resource position of the actual access resource in the access cell.

Optionally, after step 103, the method further comprises: the UE receives a broadcast channel of the access cell, wherein the broadcast channel carries bandwidth indication information of the access cell; and the UE determines the bandwidth of the access cell according to the bandwidth indication information.

Optionally, after step 103, the method further comprises: if the actual access resource comprises a first actual access resource and a second actual access resource, the UE respectively acquires a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

Optionally, as an embodiment, after step 103, the method further includes: the UE determines a second reference signal at a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width.

Optionally, as an embodiment, after step 103, the method further includes: the UE determines a second reference signal at a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

Optionally, after step 103, the method further comprises: if the resource location of the actual access resource is not the frequency domain center location of the access cell, the UE treats the subcarrier in the actual access resource center as a virtual dc subcarrier when resolving the resource block partition in the actual access resource.

The method of the embodiments of the present invention will be described with reference to specific embodiments.

In embodiment 1 of the present invention, the UE determines the resource location of the resource where the actual access resource is located in the access cell according to the location relationship between the candidate access resource and the resource where the access cell is located and the actual sequence of the detected synchronization signal.

First, before detecting the synchronization signal, the UE may determine at least one candidate sequence of the synchronization signal of the UE and a plurality of candidate access resources of the access cell. The at least one candidate sequence is a candidate sequence adopted when the access cell of the UE sends the synchronization signal, the multiple candidate access resources are access resources possibly used by the access cell of the UE, the resource where the access cell is located refers to the resource of the whole carrier where the access cell is located, and the multiple candidate access resources and the resource where the access cell is located have corresponding position relation.

Fig. 2 is a schematic diagram of a location relationship between a cell carrier and a candidate access resource according to an embodiment of the present invention. As shown in fig. 2, when the cell carrier bandwidth is 20MHz, 5 candidate access resources including candidate access resources 1 to 5 may be included; when the cell carrier bandwidth is 10MHz, 3 candidate access resources including candidate access resources 1 to 3 may be included; when the cell carrier bandwidth is 1.4MHz, only candidate access resource 1 is included. Of course, fig. 2 only shows one possible location relationship of the candidate access resources to the cell carrier, without excluding the possibility that other location relationships exist, e.g., 9 candidate access resources may be included when the cell carrier bandwidth is 10MHz, etc.

Taking an access cell with a carrier bandwidth of 20MHz and including 100 resource blocks as an example, it is not assumed that there are 5 candidate access resources in the access cell, and each candidate access resource occupies 6 resource blocks, and then the corresponding position relationship of the 5 candidate access resources on the 20MHz carrier may be preset, for example, there is one candidate access resource in the center of the carrier, and the predefined positions on both sides of the center frequency point of the carrier each include two candidate access resources, as shown in candidate access resources 1 to 5 in fig. 2.

In addition, any one of the at least one candidate sequence corresponds to one of the plurality of candidate access resources, such as sequences 1-5 corresponding to candidate access resource 1, sequences 6-10 corresponding to candidate access resource 2, and so on. In this way, the UE detects all candidate sequences, and if it is detected that the actual sequence is sequence 6, it may determine that the current actual access resource is candidate access resource 2 according to the above correspondence. The candidate sequence may be a Zadoff-Chu sequence, a Gold sequence, an m sequence, or a segment sequence extracted from the above sequence. The position relation of the candidate sequence, the candidate access resource on the carrier wave and the corresponding relation of the candidate sequence and the candidate access resource are preset.

The position relationship of the candidate access resource in the resource of the access cell may be a frequency band distance of a resource position of the candidate access resource relative to a center frequency point position of the access cell, or a frequency band distance of a resource position of the candidate access resource relative to a lowest frequency position of the access cell, or a frequency band distance of a resource position of the candidate access resource relative to a highest frequency position of the access cell, as long as the position relationship is preset, and is not particularly limited.

The plurality of candidate access resources of the UE may include candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the access cell, where N is a pre-configured natural number, and may be specified by a protocol or according to a policy of an operator.

Taking fig. 2 as an example, at this time, the first candidate access resource is candidate access resource 1, and occupies 1.4MHz, that is, the frequency domain width of 6 resource blocks; the plurality of candidate access resources of the UE at least include candidate access resources other than the first candidate access resource, which is specifically shown in fig. 2 that, in addition to candidate access resource 1, there are also candidate access resources 2 to 5. In addition, the position relationship of the 5 candidate access resources in the whole carrier resource of the access cell can be preset according to a protocol or preset according to the policy of an operator.

In the embodiment of the present invention, at least one candidate access resource of the access cell may be predefined. In particular, the candidate access resources may be predefined in terms of a maximum carrier bandwidth, and the particular carrier bandwidth may be less than or equal to the maximum carrier bandwidth. For example, each candidate access resource can satisfy the condition that the center frequency point is on a grid of 100KHz, so that the UE can conveniently search the cell, namely detect the synchronous signal. Taking fig. 2 as an example, the maximum carrier bandwidth is 20MHz, and there are 5 candidate access resources: candidate access resource 1 to candidate access resource 5. If the actual carrier bandwidth is 10MHz, the actual candidate access resources are 3, but before the UE acquires the carrier bandwidth information, it may also be assumed that 5 candidate access resources exist, and detection is performed on the 5 candidate access resources, and finally 1 or more actual access resources are determined from the middle 3 candidate access resources. That is, the candidate access resource set in the case of a large carrier bandwidth includes the candidate access resource set in the case of a small carrier bandwidth. By the design mode, the detection complexity can be simplified, and the compatibility of different bandwidth system designs can be kept.

In the embodiment of the present invention, a Zadoff-Chu sequence, an m sequence, or the like may be used as a candidate sequence. Of course, the possibility of using other sequences is not excluded. Preferably, Zadoff-Chu sequences may be used as candidate sequences in the practice of the present invention. The original sequence length of the candidate sequence may be smaller than the sequence length of the primary synchronization sequence in LTE release 8.

In an implementation manner of the embodiment of the present invention, the candidate sequence may use a sequence with a length of 61, so as to distinguish an LTE carrier of a low version from an LTE carrier of subsequent evolution.

In another implementation manner of the embodiment of the present invention, the original sequence length of the candidate sequence is equal to the sequence length of the primary synchronization sequence in LTE release 8, but the actual length of the candidate sequence is determined after the primary synchronization signal is punctured. For example, in LTE release 8, the sequence length of the primary synchronization sequence is 63, and the candidate sequence in the embodiment of the present invention may be a sequence of subcarrier positions with a direct current position at the center of a carrier being knocked out, and the final sequence length thereof is 62. For another example, the candidate sequence of the embodiment of the present invention may also be dropped by 2 or 3 subcarriers. At this time, the structure of the primary synchronization is consistent with that of the LTE system of release 8. In order to distinguish the carrier types, the candidate sequence space can be expanded, i.e. the carrier types are distinguished by newly designing the number of sequences, and the carrier types can also be distinguished by other ways, such as indicated by a broadcast channel. The function of distinguishing the carrier types is that the new carrier can adopt a plurality of candidate access resources, and the original carrier type, namely the carrier of the low-version LTE system, only has the access resource of the carrier center.

Taking fig. 2 as an example, 5 candidate access resources exist in the maximum bandwidth of 20MHz, and therefore, the synchronization signal of the access cell may adopt 5 different candidate sequences in sequence groups 0 to 4, and none of the sequences overlap. The candidate sequences of sequence set 0 to 4 correspond to candidate access resources 1 to 5, respectively, e.g. the candidate sequence of sequence set 0 corresponds to candidate access resource 1, the candidate sequence of sequence set 1 corresponds to candidate access resource 2, etc. The candidate sequence may be a complete sequence, such as a length 61 ZC sequence; alternatively, the candidate sequence may be a sequence fragment of a complete sequence, for example, in fig. 2, the candidate sequence may be a sequence fragment with a length of 61 in a long sequence with a length of at least 61 × 5, and there are 5 sequence fragments with a length of 61 in the long sequence, which correspond to candidate access resources 1 to 5, respectively.

Secondly, the UE detects the synchronization signal according to the at least one candidate sequence.

The UE detecting the synchronization signal according to the at least one candidate sequence means that the UE detects the synchronization signal on the at least one candidate sequence. When the UE detects the synchronization signal and the sequence of the synchronization signal is one of the at least one candidate sequence, it can be considered that the UE detects a synchronization signal of the access cell, and the detected candidate sequence is an actual sequence of the synchronization signal of the access cell. Here, the sequence and the access resource before the sequence of the detected synchronization signal are called a candidate sequence and a candidate access resource, while the sequence of the detected synchronization signal is called an actual sequence, and the access resource corresponding to the actual sequence is called an actual access resource. It can be seen that the actual sequence is a candidate sequence of the plurality of candidate sequences and the actual access resource is a candidate access resource of the plurality of candidate access resources. It should be noted that the actual sequence of the access cell may be transmitted on a plurality of access resources in one access cell, i.e. the UE may detect the actual sequence on a plurality of candidate access resources.

And thirdly, the UE determines the actual access resource where the actual sequence is located according to the detected actual sequence.

After the UE detects the synchronization signal, it may determine one of the candidate access resources of the access cell corresponding to the actual access resource of the access cell according to the actual sequence of the synchronization signal. For example, if the actual sequence of the synchronization signal detected by the UE is a candidate sequence of sequence group 0, the UE may determine that the actual access resource of the access cell is candidate access resource 1.

In addition, if a plurality of actual sequences, such as actual sequence 1 in sequence group 0 and actual sequence 2 in sequence group 1, are detected, the UE may determine actual access resource 1 and actual access resource 2 corresponding to actual sequence 1 and actual sequence 2, respectively, according to the correspondence between the candidate sequences and the candidate access resources.

Finally, the UE may determine the resource location of the actual access resource for which the actual sequence is detected in the access cell according to the location relationship between each candidate access resource in the candidate access resources and the resource in the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources. Wherein the actual sequence is one of the at least one candidate sequence, and the actual access resource is one of the candidate access resources.

The UE determines the resource location of the actual access resource of the detected actual sequence in the access cell, which can be specifically implemented as follows: the UE determines one of the candidate access resources corresponding to the actual sequence; and the UE determines the resource position of the actual access resource in the access cell according to the position relation between one of the candidate access resources corresponding to the actual sequence and the resource of the access cell. The UE determining one of the candidate access resources corresponding to the actual sequence means that the UE can determine which of the candidate access resources of the UE corresponds to the actual access resource for transmitting the actual sequence according to the actual sequence. Then, the UE may determine the resource location of the actual access resource in the access cell according to the location relationship between the candidate access resource and the resource in the access cell.

Specifically, the UE may determine, according to the actual sequence, the candidate access resource corresponding to the actual access resource of the actual sequence, that is, determine which candidate access resource the actual access resource is, or determine the position or the label of the actual access resource in the candidate access resources. At this time, the UE cannot obtain the resource location of the actual access resource in the entire carrier where the access cell is located. In order to obtain the resource location, the resource location of the actual access resource in the access cell is further determined according to the location relationship between the actual access resource and the resource of the candidate access resources in the access cell, that is, the predefined location relationship. For example, the UE may know, through the actual sequence 2, that the actual access resource corresponds to the candidate access resource 2, and then determine the resource location of the actual access resource in the carrier where the access cell is located according to the predefined location relationship of the candidate access resource in the carrier where the cell is located. Specifically, as shown in fig. 2, if the candidate access resource 2 corresponding to the actual access resource is at the second position from the left of the 5 predefined candidate access resources, the position of the actual access resource on the carrier can be determined.

Further, the UE may determine the location of the center frequency point of the access cell according to the resource location of the actual access resource in the access cell. After determining that the actual access resource is located at the position of the carrier, the UE may also determine a specific position of the carrier, such as a center frequency point position of the carrier.

In addition, after determining the resource position of the actual access resource of the detected actual sequence in the access cell, the UE may also determine the bandwidth of the access cell. In an implementation manner of the embodiment of the present invention, the UE may receive a broadcast channel of the access cell, obtain bandwidth indication information of the access cell carried by the broadcast channel from the broadcast channel, and determine the bandwidth of the access cell according to the bandwidth indication information. At this time, the complete position of the carrier can be completely determined by combining the determined central frequency point of the carrier and the bandwidth of the carrier acquired in the broadcast channel.

In addition, after determining the resource position of the actual access resource of the detected actual sequence in the access cell, the UE may also obtain the random access configuration of the access cell. In the embodiments of the present invention, the UE may determine a plurality of actual access resources. And if the actual access resource comprises a first actual access resource and a second actual access resource, the UE respectively acquires a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource. Wherein the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource. The first random access configuration and the second random access configuration may be uplink random access configuration information, including information such as a preamble sequence of random access and resource configuration. The UE may receive a first random access configuration on a broadcast channel resource or a common channel resource corresponding to a first actual access resource, and receive a second random access configuration on a broadcast channel resource or a common channel resource corresponding to a second actual access resource. Therefore, a plurality of first access resources in one carrier can be guaranteed to respectively support independent access of the UE, and equivalently, a plurality of subsystems are arranged on one carrier, the plurality of subsystems can be subsystems of the same standard or the same version (the standard can be LTE, CDMA and the like, and the version can be LTE version 8, version 12 and the like), and can also be subsystems of different standards or different versions, so that the system multiplexing flexibility is achieved, and the effects of balancing access loads and the like can be achieved.

In addition, after determining the resource position of the actual access resource of the actual sequence in the access cell, the UE may also determine a second reference signal corresponding to the actual access resource. In the embodiment of the present invention, a reference signal generated by taking the center frequency point of the access cell as the center and the number of resource blocks included in the bandwidth of the access cell as the frequency domain width in the prior art is referred to as a first reference signal, and a reference signal corresponding to the actual access resource is referred to as a second reference signal.

In an implementation manner of the embodiment of the present invention, the second reference signal is a reference signal segment corresponding to the resource location truncated from the first reference signal, and the first reference signal is a reference signal generated by taking a central frequency point of the access cell as a center and taking the number of resource blocks included in a bandwidth of the access cell as a frequency domain width. Fig. 3 is a diagram illustrating a relationship between a reference signal and a cell carrier according to an embodiment of the present invention. As shown in fig. 3, the access cell corresponds to a first reference signal and the actual access resource corresponds to a second reference signal. As shown in fig. 3, the first reference signal is a reference signal generated by using the number of resource blocks included in the bandwidth of the access cell as the frequency domain width and the center frequency point of the access cell as the center, and the corresponding cell carrier is the 20MHz carrier shown in fig. 2. The actual access resource is assumed to be the candidate access resource 2 in fig. 2, and the second reference signal is a part of the reference signal corresponding to the first reference signal on the actual access resource. As shown in fig. 3, assuming that the reference signal in the frequency domain direction in one candidate access resource includes two value points (of course, other value points are not excluded, and this is only an example), the first reference signal is { g, h, c, d, a, b, e, f, i, j }. When the UE determines that the actual access resource is the second candidate access resource on the left side of the carrier of the access cell, and determines the resource location of the actual access resource in the entire carrier, the UE may intercept the second reference signal { c, d } at the resource location of the actual access resource from the first reference signal { g, h, c, d, a, b, e, f, i, j }, and then may perform measurement using the second reference signal of { c, d }. Then, the UE may obtain the bandwidth information of the access cell from the broadcast channel, and then obtain the reference signal on the entire carrier of the access cell.

In another implementation manner of the embodiment of the present invention, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, a reference signal in a bandwidth of an access cell is a cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width. Fig. 4 is a diagram illustrating a relationship between a reference signal and a cell carrier according to an embodiment of the present invention. As shown in fig. 4, the access cell corresponds to a first reference signal and the actual access resource corresponds to a second reference signal. Specifically, the first reference signal before being shifted may be as shown in fig. 3, and the corresponding cell carrier is the 20MHz carrier shown in fig. 2. As shown in fig. 3, assuming that the reference signal in the frequency domain direction in one candidate access resource includes two value points (of course, other value points are not excluded, and this is only an example), the first reference signal may be represented by { g, h, c, d, a, b, e, f, i, j }. Similarly, assuming that the actual access resource is the candidate access resource 2 in fig. 2, after the UE determines that the actual access resource is the second candidate access resource on the left side of the carrier of the access cell and determines the resource location of the actual access resource in the entire carrier, the reference signal value point { a, b } corresponding to the candidate access resource at the center position of the first reference signal { g, h, c, d, a, b, e, f, i, j } before the cyclic shift can be used as the second reference signal at the resource location of the actual access resource, that is, the value point at the center position of the original carrier is used as the value point of the second reference signal at this time. Accordingly, the first reference signal after cyclic shift is { c, d, a, b, e, f, i, j, g, h } as shown in fig. 4. The second reference signal of a, b can be used for measurement. Then, the UE may obtain the bandwidth information of the access cell from the broadcast channel, and then obtain the reference signal on the entire carrier of the access cell.

In addition, after determining the resource position of the actual access resource of the actual sequence in the access cell, the UE needs to determine the resource that can be used in the actual access resource. If the resource location of the actual access resource is not the frequency domain center location of the access cell, the UE may treat the subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource. In the embodiment of the invention, before receiving the broadcast channel, the UE needs to detect the synchronization signal. If the candidate access resource carrying the synchronization signal is not in the center of the carrier, the candidate access resource does not reserve the direct current subcarrier. Since the dc subcarrier is generally located at the central frequency point of the carrier, if the design structure of the synchronization signal sequence of LTE release 8 is to be maintained, that is, a sequence with an even length obtained by removing a numerical point at the central dc subcarrier position from a sequence with an odd length, it is necessary to reserve a subcarrier at the central frequency point of the actual access resource as the virtual dc subcarrier when the actual access resource is not located at the central frequency point of the carrier. However, the virtual dc subcarrier actually occupies a real subcarrier, and the virtual dc subcarrier does not belong to any resource block, which may cause the real dc subcarrier at the central frequency point of the carrier to belong to a special resource block at the center of the carrier, but the special resource block cannot use the real dc subcarrier.

Fig. 5 is a schematic diagram of positions of dc subcarriers in carrier centers and non-carrier centers according to an embodiment of the present invention. As shown in fig. 5, arrow a indicates the center position of the 20MHz carrier, and arrow B indicates the center position of the actual access resource. In the special resource block at the carrier center indicated by arrow a, the dc subcarrier belongs to a specific resource block in the special resource block, that is, the candidate access resource at the carrier center position includes the actual dc subcarrier at the carrier center, and the resource block is not scheduled to the UE due to the interference problem at the dc subcarrier. In addition, it should be understood that in the actual access resource, not all subcarriers are used for transmitting resources, and there may be some null subcarriers. As shown in fig. 5, assuming that the actual access resources are 36 subcarriers located at both sides of the center of the carrier, there may be 5 null subcarriers and 31 valid subcarriers for transmitting the resources.

Fig. 6 is a schematic diagram of the relationship between the dc subcarriers of the candidate access resources in the carrier center and the non-carrier center. As a specific example, the resource partitioning structures at the virtual dc subcarrier and the real dc subcarrier are shown in 6-1 and 6-2 of fig. 6, in 6-1 of fig. 6, the left side of the candidate access resource is 5 null subcarriers +30 effective subcarriers, the right side is 6 null subcarriers +30 effective subcarriers, and 1 subcarrier occupied by the virtual dc position belongs to the candidate access resource; in fig. 6-2, the left and right sides of the candidate access resource are 6 null subcarriers +30 effective subcarriers, and 1 subcarrier occupied by the dc position does not belong to the candidate access resource. As shown in fig. 6-1, when the candidate access resource is not located at the carrier center, the number of subcarriers on the left and right sides of the virtual dc position is not symmetrical, which affects the resource block division on one side of the virtual dc position. Especially, when the UE detects the synchronization signal, the UE cannot distinguish whether the position is a virtual dc position or a real dc position, which may cause ambiguity in resource block determination for subsequent reception of a broadcast channel. Firstly, UE determines the position of a direct current carrier or the position of a virtual direct current subcarrier in a candidate access resource where the synchronization signal is located by detecting the synchronization signal, but the UE cannot distinguish the position of the direct current carrier or the position of the virtual direct current subcarrier; next, the UE receives a broadcast channel at the frequency domain side of the dc subcarrier position or the virtual dc subcarrier position within the candidate access resource. The selection of which side can be predefined, which can ensure that the resource block division or the sequencing at the side is a certain integer, and each resource block still comprises 12 subcarriers, thereby avoiding the ambiguity of the resource block division and the inclusion of unequal subcarrier numbers. Taking fig. 6 as an example, in 6-1 in fig. 6, the right side of the virtual dc or dc subcarriers can be predefined to detect the broadcast channel, and it can be seen that there are 36 subcarriers on the right side, which is exactly the frequency domain width of 3 resource blocks, and 3 resource blocks on the left side and one subcarrier less.

The above method for determining the reference signal sequence may also be implemented independently of the above embodiment for determining the resource location of the actual access resource in the access cell. The method specifically comprises the following steps:

s1: the UE adopts at least one candidate sequence to detect a synchronization signal sent by an access cell and determines an actual sequence of the synchronization signal; determining an actual access resource of the access cell according to the determined actual sequence of the synchronization signal, wherein the at least one candidate sequence comprises the actual sequence;

s2: the UE determines a second sequence of a second reference signal on the actual access resource, wherein the first sequence of the first reference signal is generated by the maximum bandwidth of a single carrier supported by an LTE system, the second sequence is a second fragment sequence which is intercepted from the center of the first sequence and a first resource position with a first frequency domain width, and the first frequency domain width is the frequency domain width of the actual access resource;

s3: and the UE communicates with the access cell according to the second sequence.

Optionally, the actual access resource is not located in the center of the frequency domain of the access cell;

optionally, a direct current subcarrier not belonging to any resource block is independently reserved in the center of the frequency domain of the actual access resource;

Optionally, the UE determines a third sequence of a third reference signal on the reconfigured resource, where the third sequence is a third segment sequence truncated from a second resource position of the first sequence or the first sequence cyclically connected end to end, and a position offset relationship between the second segment sequence at the first resource position in the first sequence or the first sequence cyclically connected end to end and a third segment sequence at the second resource position is the same as a position offset relationship between the second sequence at the actual access resource on the carrier of the access cell and the third sequence at the reconfigured resource. The reconfiguration resource is a resource reconfigured by the network side equipment by the UE, the frequency domain width of the reconfiguration resource is not greater than the carrier bandwidth of the access cell, and the reconfiguration resource and the actual access resource may be overlapped or not overlapped. Further comprising, the UE communicating with the access cell according to the third sequence.

The embodiment of the invention provides User Equipment (UE), which comprises a processing unit and a communication unit.

The processing unit is configured to detect a synchronization signal sent by an access cell by using at least one candidate sequence, and determine an actual sequence of the synchronization signal; determining an actual access resource of the access cell according to the determined actual sequence of the synchronization signal, wherein the at least one candidate sequence comprises the actual sequence; a second sequence for determining a second reference signal on the actual access resource, the first sequence of the first reference signal being generated with a maximum bandwidth of a single carrier supported by the LTE system, the second sequence being a second sequence of segments truncated from a first resource position at a center of the first sequence and having a first frequency domain width, the first frequency domain width being the frequency domain width of the actual access resource;

The communication unit is configured to communicate with the access cell according to the second sequence.

Wherein the processing unit may be a processor. The communication unit may be a transceiver.

The UE is configured to perform the above method, and the limitation is not repeated.

The following examples are given in detail:

see example a of fig. 18 (assuming that the maximum bandwidth of the current LTE single carrier is 20MHz, and the carrier bandwidth of the access cell is 10 MHz):

the actual access resource is the frequency domain width of 6 resource blocks in 10MHz, the first sequence is generated at the maximum of 20MHz, the first sequence is assumed to be { k, i, g, e, c, a, b, d, f, h, j, m }, the second sequence is a second fragment sequence which is extracted from a first resource position which is at the center in the first sequence and has the frequency domain width of 6 resource blocks, and the second fragment sequence is assumed to be { a, b }; the second sequence on the actual access resource on the carrier of the 10MHz bandwidth of the access cell is { a, b }, i.e. it is a second sequence of fragments truncated from the first resource position in the center of the first sequence and having a width of 6 resource blocks.

The UE may detect a synchronization signal from the actual access resource to access the cell, where the synchronization signal may be the same as the synchronization signal of the current LTE system, and the advantage is that the UE may support backward compatibility, the actual access resource may not be located in the center of the frequency domain of the access cell, and the center of the actual access resource may independently reserve a dc subcarrier, where the dc subcarrier does not belong to any resource block, similar to the reservation of the dc subcarrier at the center of the carrier in the conventional LTE system accessed from the center of the frequency domain. After the UE accesses, it can use the determined second sequence of the second reference signal on the actual access resource to communicate with the network side, for example, perform measurement, synchronization and/or demodulation using the second reference signal.

After accessing, the UE may also be reconfigured with a frequency domain resource, where the frequency domain resource may be referred to as a reconfiguration resource, a frequency domain width of the reconfiguration resource is not greater than a carrier bandwidth of the access cell, and the reconfiguration resource and the actual access resource may be overlapped or not overlapped. For example, the UE may be reconfigured to use the entire carrier 10MHz bandwidth of the access cell, or may be reconfigured to use a portion of the resources of the carrier 10MHz bandwidth of the access cell, which may or may not overlap with the actual access resources. Or, the reconfiguration process may not be configured through a radio resource control signaling by a network side device, such as a base station, or the reconfiguration resource may be acquired by the UE receiving a broadcast message on an actual access resource or a broadcast channel resource corresponding to the actual access resource; or even the UE may decide the above-mentioned reconfigured bandwidth according to its own service condition, and the UE may also report the determined reconfigured resource to the network side device.

After reconfiguration, the UE needs to determine a third sequence of a third reference signal on the reconfigured resource, where the third sequence is a third segment sequence extracted from the second resource position of the first sequence, and as shown in fig. 18, it is assumed that the reconfigured resource is adjacent to the actual access resource but does not overlap, and the overlapping is not excluded. It can be seen that the third sequence of the reconfigured resource is a third fragment sequence of { d, f, h } truncated from the first sequence at the second resource location, the second resource location being selected to satisfy the condition: the position offset relationship between the second segment sequence at the first resource position and the third segment sequence at the second resource position in the first sequence is the same as the position offset relationship between the second sequence at the actual access resource and the third sequence at the reconfiguration resource on the carrier of the access cell. Specifically, the second sequence { a, b } on the actual access resource on the carrier of the access cell and the third sequence { d, f, h } on the reconfiguration resource on the carrier of the access cell are adjacent in position offset relationship, so that the second fragment sequence { a, b } truncated at the first resource position on the first sequence and the second fragment sequence { d, f, h } truncated at the second resource position on the first sequence also maintain the same position offset relationship, that is, the sequence of the reference signal on the carrier of the 10MHz access cell is a duplicate of the sequence truncated from the first sequence. After the UE is reconfigured, the UE may communicate with the network side by using the determined third sequence of the third reference signal, for example, perform measurement, synchronization and/or demodulation by using the third reference signal. See example b of fig. 19 (assuming the maximum bandwidth of the current LTE single carrier is 20MHz, and the carrier bandwidth of the access cell is 15 MHz):

The actual access resource is the frequency domain width of 6 resource blocks in 15MHz, the first sequence is generated at the maximum of 20MHz, the first sequence is assumed to be { k, i, g, e, c, a, b, d, f, h, j, m }, the second sequence is a second fragment sequence which is extracted from a first resource position which is at the center in the first sequence and has the frequency domain width of 6 resource blocks, and the second fragment sequence is assumed to be { a, b }; the second sequence on the actual access resource on the carrier of the 15MHz bandwidth of the access cell is { a, b }, i.e. it is a second sequence of fragments truncated from the first resource position in the center of the first sequence and having a width of 6 resource blocks.

The UE synchronization and reconfiguration procedure is the same as the above-mentioned embodiment of fig. 18, and is not described herein again.

After reconfiguration, the UE needs to determine a third sequence of a third reference signal on the reconfigured resource, where the third sequence is a third segment sequence extracted from a second resource position of the first sequence cyclically connected end to end, as shown in fig. 18 specifically, it is assumed that the reconfigured resource is adjacent to, but not overlapping with, an actually accessed resource, and the overlapping is certainly not excluded. It can be seen that the first sequence of the first-to-last cycle is { k, i, g, e, c, a, b, d, f, h, j, m, k, i. }, and the third sequence of the reconfiguration resource is a third fragment sequence of { h, j, m, k } truncated from a second resource location on the first sequence of the first-to-last cycle, where the second resource location is selected to satisfy the condition: the position offset relationship between the second segment sequence at the first resource position and the third segment sequence at the second resource position in the first sequences cyclically connected end to end is the same as the position offset relationship between the second sequence at the actual access resource and the third sequence at the reconfiguration resource on the carrier of the access cell. Specifically, the second sequence { a, b } on the actual access resource on the carrier of the access cell and the third sequence { h, j, m, k } on the reconfiguration resource on the carrier of the access cell are adjacent in position offset relationship, so that the second fragment sequence { a, b } intercepted at the first resource position on the first sequence cyclically connected end to end and the second fragment sequence { h, j, m, k } intercepted at the second resource position on the first sequence cyclically connected end to end also maintain the same position offset relationship, that is, the sequence of the reference signal on the carrier of the 15MHz access cell is a duplicate of the sequence intercepted from the first sequence cyclically connected end to end. After the UE is reconfigured, the UE may communicate with the network side by using the determined third sequence of the third reference signal, for example, perform measurement, synchronization and/or demodulation by using the third reference signal.

The embodiment can ensure that backward compatibility is supported; the sequence of the synchronous signal and/or the mapping mode of the broadcast channel do not need to be modified, and the realization complexity is low; the UE is not required to access from the carrier center, inter-cell interference coordination can be achieved, and non-standard LTE bandwidth, such as 7MHz or 8MHz bandwidth, can also be supported, because current LTE only supports 6 standard bandwidths, i.e. 1.4, 3, 5, 10, 15, 20 MHz.

The UE may also be configured to perform the method, and the limitation is not repeated. The method can also be used on the network side, specifically:

s1: the base station determines actual access resources on a carrier wave of an access cell, wherein the actual access resources comprise second reference signals, a second sequence of the second reference signals is a second fragment sequence which is intercepted from a first resource position of a center of a first sequence and has a first frequency domain width, the first frequency domain width is the frequency domain width of the actual access resources, and the first sequence of the first reference signals is generated by the maximum bandwidth of a single carrier supported by an LTE system;

s2: the base station determines a third reference signal on a carrier wave of an access cell, wherein a third sequence of the third reference signal is a third fragment sequence intercepted from a second resource position of the first sequence circularly connected from the first sequence or the head to the tail, and a position offset relationship between the second fragment sequence at the first resource position and the third fragment sequence at the second resource position in the first sequence circularly connected from the first sequence or the head to the tail is the same as a position offset relationship between the second sequence at the actual access resource position on the carrier wave of the access cell and the third sequence on the carrier wave of the access cell.

S3: the base station transmits the second reference signal and the third reference signal on a carrier of the access cell.

Optionally, the actual access resource is not located in the center of the frequency domain of the access cell;

optionally, a direct current subcarrier not belonging to any resource block is independently reserved in the center of the frequency domain of the actual access resource;

the above method can also be used on the device side, such as terminals and base stations.

The embodiment of the invention provides a base station which comprises a processing unit and a sending unit.

The processing unit is configured to determine an actual access resource on a carrier wave of an access cell, where the actual access resource includes a second reference signal, a second sequence of the second reference signal is a second segment sequence that is truncated from a first resource position that is at a center of a first sequence and has a first frequency domain width, the first frequency domain width is the frequency domain width of the actual access resource, and the first sequence of the first reference signal is generated with a maximum bandwidth of a single carrier supported by an LTE system; the third sequence of the third reference signal is a third fragment sequence intercepted from the first sequence or a second resource position of the first sequence which is cyclically connected from head to tail, and the position offset relationship between the second fragment sequence at the first resource position and the third fragment sequence at the second resource position in the first sequence or the first sequence which is cyclically connected from head to tail is the same as the position offset relationship between the second sequence at the actual access resource position on the carrier of the access cell and the third sequence on the carrier of the access cell;

The sending unit is configured to send the second reference signal and the third reference signal on a carrier of the access cell.

Wherein the processing unit may be a processor. And the sending unit can be a transmitter.

The base station is used for executing the method, and the limitation is not repeated. The method for determining the reference signal sequence may also be implemented independently according to the following embodiments, without depending on the above embodiments for determining the resource location of the actual access resource in the access cell. The sequence in this embodiment is a sequence of a reference signal. The method specifically comprises the following steps:

s1: the UE determines a fourth sequence, wherein the fourth sequence is a sequence at a position corresponding to a transmission bandwidth resource of the UE which is extracted from a fifth sequence, the fifth sequence is generated by using the maximum bandwidth of a single carrier supported by an LTE system, or the fifth sequence is generated by using the maximum bandwidth of the single carrier supported by the LTE system and is obtained by cyclic shift or cyclic end-to-end connection;

s2: and the UE communicates with a base station according to the fourth sequence.

And the fourth sequence is used as a sequence corresponding to a fourth reference signal. The UE receives the fourth reference signal over the transmission bandwidth. The UE may then use the fourth reference signal for measurement, synchronization, and/or demodulation to communicate with the base station.

Optionally, the transmission bandwidth is not located in a center of a frequency domain bandwidth of a cell served by the base station for the UE. Optionally, the transmission bandwidth is not located in a center of a carrier used by the base station for serving the UE.

Optionally, the fourth sequence is truncated from a third resource location at the center of the fifth sequence and having a third frequency domain width, where the third frequency domain width is a transmission bandwidth width of the UE.

Optionally, the fourth sequence is not a central part of the fifth sequence, or the fourth sequence is truncated at a third resource position that is determined according to the first offset from the center of the fifth sequence and has a third frequency domain width, where the third frequency domain width is a transmission bandwidth width of the UE.

Optionally, the transmission bandwidth width is smaller than a maximum bandwidth of a single carrier supported by the LTE system.

Optionally, the UE is accessed through the carrier where the transmission bandwidth is located or is accessed through a carrier other than the carrier where the transmission bandwidth is located.

Optionally, the UE is accessed through a transmission bandwidth or a frequency band other than the transmission bandwidth in the same carrier. And the resource used by the UE for accessing the carrier wave in which the fourth sequence is located is the actual access resource of the UE.

Wherein the transmission bandwidth of the UE and the actual access resource of the UE may or may not overlap.

Optionally, the first offset is an offset of a transmission bandwidth center of the UE with respect to a frequency point corresponding to a center of the fifth sequence; or the first offset is an offset of a sequence center corresponding to the transmission bandwidth of the UE with respect to the fifth sequence center.

The transmission bandwidth may be obtained by the UE through signaling of a network side device, such as a base station, for example, through radio resource control signaling, or obtained by the UE receiving a broadcast message on an actual access resource or a broadcast channel resource corresponding to the actual access resource, or the UE may determine the transmission bandwidth according to its own service condition. The UE may also report the determined transmission bandwidth to the network side device. The UE may determine the first offset by a positional relationship of the transmission bandwidth and the access resource.

Alternatively, the first offset may be obtained by the UE through signaling of a network side device, such as a base station, for example, through radio resource control signaling, or obtained by the UE receiving a broadcast message on an actual access resource or a broadcast channel resource corresponding to the actual access resource, or the UE may determine the first offset according to its own service condition. The UE may also report the determined first offset to a network side device.

Optionally, the actual access resource is not located in a frequency domain center of a cell served by the base station for the UE. Of course, optionally, it is not excluded that the actual access resource may also be located in a center of a frequency domain of a cell served by the base station for the UE.

Optionally, a direct current subcarrier not belonging to any resource block is independently reserved in the center of the frequency domain of the actual access resource.

Optionally, a direct current subcarrier not belonging to any resource block is independently reserved in the center of the frequency domain of the transmission bandwidth.

For example, assuming that the maximum bandwidth of the current LTE single carrier is 20MHz, so that the fifth sequence is generated at 20MHz, assuming that the fifth sequence is { k, i, g, e, c, a, b, d, f, h, j, m }, and the UE can determine the position and specific sequence of the fourth sequence in the fifth sequence through the first offset and the transmission bandwidth center of the UE, i.e., determine the fourth sequence, such as { e, c, a, b, d, f }, or { d, f, h, j }, according to the position of the fourth sequence in the fifth sequence, wherein the position of the first offset is the offset of the center of the fourth sequence relative to the center of the fifth sequence. Alternatively, the fifth sequence is a cyclic shift of { k, i, g, e, c, a, b, d, f, h, j, m }, such as { j, m, k, i, g, e, c, a, b, d, f, h }, and the UE can determine the position of the fourth sequence in the fifth sequence and a specific sequence, such as { e, c, a, b, d, f }, or { b, d, f, h }, through the first offset and the transmission bandwidth center of the UE, wherein the position of the first offset is an offset of the fourth sequence center relative to the fifth sequence center.

By the design mode, the problem of how to obtain the reference signal sequence on the transmission bandwidth actually used by the UE under the condition that the UE does not know the actual bandwidth size used by the base station and the base station generates the reference signal sequence used on the actual bandwidth used by the whole base station in a continuous generation mode through the sequence generator is solved. By this design, the bandwidth used by the base station can be decoupled from the bandwidth used by the UE, and the reference signal sequence used by the base station over the entire actually used bandwidth can be continuously generated by the sequence generator. By the design mode, the sequence generation complexity can be simplified, and the compatibility of different bandwidth system designs is kept. In addition, the UE may be allowed to use a part of the bandwidth actually used by the base station, and the bandwidth actually used by the base station may be a standard LTE bandwidth or a non-standard LTE bandwidth, such as 6 standard bandwidths that may or may not be currently supported by LTE, i.e., 1.4, 3, 5, 10, 15, 20 MHz.

The embodiment of the invention provides User Equipment (UE), which comprises a processing unit and a communication unit.

The processing unit is configured to determine a fourth sequence, where the fourth sequence is a sequence at a position corresponding to a transmission bandwidth resource of the UE extracted from a fifth sequence, the fifth sequence is generated with a maximum bandwidth of a single carrier supported by an LTE system, or the fifth sequence is generated with the maximum bandwidth of a single carrier supported by an LTE system and is obtained by cyclic shift or cyclic end-to-end connection;

The communication unit is configured to communicate with a base station according to the fourth sequence.

Wherein the processing unit may be a processor. The communication unit may be a transceiver.

The UE is configured to perform the above method, and the limitation is not repeated.

The method can also be used on the network side, and is consistent with the UE side method, specifically:

s1: the base station determines a fourth sequence, wherein the fourth sequence is a sequence at a position corresponding to the transmission bandwidth resource of the UE which is extracted from a fifth sequence, and the fifth sequence is generated by the maximum bandwidth of a single carrier supported by the LTE system or generated by the maximum bandwidth of the single carrier supported by the LTE system and is obtained by cyclic shift or head-to-tail cyclic connection;

s2: and the base station communicates with the UE according to the fourth sequence.

And the fourth sequence is used as a sequence corresponding to a fourth reference signal. The base station transmits the fourth reference signal over the transmission bandwidth. The UE may then use the fourth reference signal for measurement, synchronization, and/or demodulation so that the base station may communicate with the UE.

The network side method is consistent with the UE side, and details are not repeated.

The embodiment of the invention provides a base station which comprises a processing unit and a communication unit.

The processing unit is configured to determine a fourth sequence, where the fourth sequence is a sequence at a position corresponding to a transmission bandwidth resource of the UE extracted from a fifth sequence, and the fifth sequence is generated by using a maximum bandwidth of a single carrier supported by an LTE system or generated by using a maximum bandwidth of a single carrier supported by an LTE system and is obtained by cyclic shift or cyclic end-to-end connection;

the communication unit is configured to communicate with the UE according to the fourth sequence.

Wherein the processing unit may be a processor. The communication unit may be a transceiver.

The base station is used for executing the method, and the limitation is not repeated.

Fig. 7 is a flowchart of a method for indicating cell access resources according to an embodiment of the present invention. The method of fig. 7 is performed by a base station.

701, determining the actual access resource of the current cell and the actual sequence of the synchronization signal of the current cell.

The actual access resource is at least one of candidate access resources used by the current cell to transmit a synchronization signal, the actual sequence is one of at least one candidate sequence of the synchronization signal, and any one of the at least one candidate sequence corresponds to one of the candidate access resources.

The synchronization signal is transmitted with the actual sequence on the actual access resource 702.

In the embodiment of the invention, the synchronization signal is sent in the actual access resource by the actual sequence according to the corresponding relation between the sequence for sending the synchronization signal and the candidate access resource of the synchronization signal, so that the UE can determine the resource position of the actual access resource in the current cell according to the actual sequence, the actual access resource and the relative position relation between the candidate access resource indicated by the actual sequence and the current cell, the interference influence of the dense cell to the UE access can be avoided to a certain extent when the UE accesses the current cell, the inter-cell interference of a common control channel is coordinated, and the detection performance of the common control channel is improved.

Optionally, one of the at least one candidate sequence is a complete sequence; alternatively, one of the at least one candidate sequence is a fragment sequence of the complete sequence.

Optionally, there is at least one candidate access resource in the plurality of candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with frequency domain widths of the central N resource blocks of the current cell, where N is a pre-configured natural number. In addition, N may be specified by a protocol, or according to an operator's policy.

Optionally, after step 702, the method further comprises: a broadcast channel is transmitted in the current cell. The broadcast channel carries bandwidth indication information of the current cell, and the bandwidth indication information of the current cell is used for indicating the bandwidth of the current cell.

Optionally, after transmitting the synchronization signal in the actual sequence on the actual access resource, the method further includes: and if the actual access resource comprises a first actual access resource and a second actual access resource, sending the first random access configuration of the current cell at the first actual access resource, and sending the second random access configuration of the current cell at the second actual access resource.

Optionally, after step 702, the method further comprises: and if the actual access resource comprises a first actual access resource and a second actual access resource, sending a first random access configuration of the current cell on a broadcast channel resource or a common channel resource corresponding to the first actual access resource, and sending a second random access configuration of the current cell on a broadcast channel resource or a common channel resource corresponding to the second actual access resource.

Optionally, after step 702, the method further comprises: and transmitting a second reference signal at the resource position of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of the frequency domain.

Optionally, as another embodiment, after step 702, the method further includes: and transmitting a second reference signal at the resource position of the actual access resource. The second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

Optionally, step 701 is specifically implemented as: and if the resource position of the actual access resource is not in the frequency domain center position of the current cell, treating the subcarrier in the actual access resource center as a virtual direct current subcarrier when analyzing the resource block division in the actual access resource.

The method of the embodiments of the present invention will be described with reference to specific embodiments.

In embodiment 2 of the present invention, a sequence of a synchronization signal sent by a base station can indicate a resource position relationship between a resource for sending the synchronization signal and a resource in which a current cell is located, and the base station sends the synchronization signal in an actual sequence through an actual access resource, so that the UE can avoid interference influence on UE access caused by cell concentration on the premise that the UE can analyze the synchronization signal.

First, the base station may determine the actual access resource and the actual sequence of the good synchronization signal.

There may be multiple candidate access resources and multiple candidate sequences in the current cell of the base station. The candidate access resource is an access resource that can be used when the synchronization signal is transmitted, the candidate sequence is a sequence that can be used when the synchronization signal is transmitted, and each of the candidate sequences corresponds to one of the candidate access resources.

Fig. 2 is a schematic diagram illustrating a relationship between a cell carrier and a candidate access resource according to an embodiment of the present invention. As shown in fig. 2, when the cell carrier bandwidth is 20MHz, 5 candidate access resources including candidate access resources 1 to 5 may be included; when the cell carrier bandwidth is 10MHz, 3 candidate access resources including candidate access resources 1 to 3 may be included; when the cell carrier bandwidth is 1.4MHz, only candidate access resource 1 is included. Of course, fig. 2 only shows one possible relation of candidate access resources to the cell carrier, and there may be other possibilities, for example, 9 candidate access resources may be included when the cell carrier bandwidth is 10MHz, and so on.

The plurality of candidate access resources of the base station may include candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the current cell, where N is a pre-configured natural number, and may be specified by a protocol or according to a policy of an operator. For example, in fig. 2, candidate access resource 1 is a first candidate access resource, and occupies 1.4MHz, that is, the frequency domain width of 6 resource blocks; in fig. 2, the candidate access resources of the base station include, in addition to candidate access resource 1, candidate access resources 2 to candidate access resource 5, and the position relationship of the candidate access resources in the entire carrier resource in which the current cell is located is preset.

In this embodiment of the present invention, the at least one candidate access resource of the current cell may be predefined, for example, defined according to a maximum carrier bandwidth, and the specific carrier bandwidth may be smaller than or equal to the maximum carrier bandwidth. For example, each candidate access resource can satisfy the condition that the center frequency point is on a grid of 100KHz, so that the UE can conveniently search the cell, namely detect the synchronous signal. Taking fig. 2 as an example, the maximum bandwidth is 20MHz, and there are 5 candidate access resources: candidate access resource 1 to candidate access resource 5. If the actual bandwidth is 10MHz, the actual candidate access resources are 3.

In addition, when the base station determines the actual access resource, it needs to determine the resource blocks that can be used in the actual access resource according to the position of the actual access resource. If the resource location of the actual access resource is not the frequency domain center location of the current cell, the base station may treat the subcarrier at the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource. Since the dc sub-carrier is generally located at the center frequency point of the carrier, if the original design structure of the synchronization signal sequence is to be maintained, that is, the odd-long sequence gets an even-long sequence by knocking off the numerical point at the center dc sub-carrier position, when the actual access resource is not located at the center of the carrier, a sub-carrier needs to be reserved at the center frequency point of the actual access resource as the virtual dc sub-carrier. However, the virtual dc subcarrier actually occupies a real subcarrier, and the virtual dc subcarrier does not belong to any resource block, and this may cause the real dc subcarrier at the central frequency point of the carrier to belong to a special resource block at the center of the carrier, and the special resource block cannot use the real dc subcarrier. Specifically, as shown in fig. 5, a subcarrier not counting any resource block is reserved in an actual access resource center at a carrier center position, and the subcarrier is called a virtual dc subcarrier; the candidate access resources at the carrier center position include the actual dc sub-carrier of the carrier center, and the actual dc sub-carrier needs to be counted into a certain resource block, but the resource block cannot be scheduled to the UE due to the interference problem at the dc sub-carrier. In addition, as can be seen from the resource division structures at the virtual dc subcarrier and the real dc subcarrier shown in fig. 6-1 and 6-2, the number of subcarriers on the left and right sides of the virtual dc position is not symmetrical, which will affect the resource block division on one side of the virtual dc position. Especially, when the UE detects the synchronization signal, the UE cannot distinguish whether the position is a virtual dc position or a real dc position, which may cause ambiguity in resource block determination for subsequent reception of a broadcast channel. Therefore, when the base station transmits the broadcast channel, the base station can select the frequency domain resource on the same side of the position of the direct current subcarrier and the position of the virtual direct current subcarrier to transmit the broadcast channel, so as to ensure that the resource blocks on the side are divided or ordered into integers. Taking fig. 6 as an example, in 6-1 in fig. 6, the right side of the virtual dc or dc sub-carriers can be predefined to transmit the broadcast channel, it can be seen that there are 36 sub-carriers on the right side, which is exactly the frequency domain width of 3 resource blocks, and 3 resource blocks on the left side and one less sub-carrier.

In an implementation manner of the embodiment of the present invention, a base station may determine an actual access resource for sending a synchronization signal, and then determine, according to a resource location relationship between the actual access resource and a current cell, that a candidate sequence corresponding to the resource location relationship is an actual sequence for sending the synchronization signal, where the actual sequence is one of the candidate sequences for sending the synchronization signal, and the actual access resource is one of the candidate access resources for sending the synchronization signal.

In another implementation manner of the embodiment of the present invention, the base station may determine an actual sequence for transmitting the synchronization signal first, and then determine the actual sequence for transmitting the synchronization signal according to a candidate sequence for transmitting the synchronization signal corresponding to the actual sequence, where the actual sequence is one of the candidate sequences for transmitting the synchronization signal, and the actual access resource is one of the candidate access resources for transmitting the synchronization signal.

For example, taking a current cell with a carrier bandwidth of 20MHz and including 100 resource blocks as an example, it is not assumed that there are 5 candidate access resources in the current cell, and each candidate access resource occupies 6 resource blocks, and then the corresponding position relationship of the 5 candidate access resources on the carrier of 20MHz may be preset, for example, there is one candidate access resource in the center of the carrier, and each predefined position on both sides of the center frequency point of the carrier includes two candidate access resources. In addition, any one of the at least one candidate sequence corresponds to one of the plurality of candidate access resources, such as sequences 1-5 corresponding to candidate access resource 1, sequences 6-10 corresponding to candidate access resource 2, and so on. If the actual access resource of the current cell for selecting to send the synchronous signal is 2, the actual sequence of the current cell for selecting to send the synchronous signal can only be selected to be 6-10; alternatively, if the actual sequence of the synchronization signal selected to be transmitted by the current cell is 6, the current cell can only select the candidate access resource 2 as the actual access resource of the synchronization signal.

Alternatively, the candidate sequence may be a complete sequence; or the candidate sequence may be a fragment of the complete sequence.

In the embodiment of the invention, the candidate sequence can be a Zadoff-Chu sequence or an m sequence and the like. Of course, the possibility of using other sequences is not excluded. Preferably, the candidate sequence in the practice of the present invention may be a Zadoff-Chu sequence. The original sequence length of the candidate sequence may be smaller than the sequence length of the primary synchronization sequence in LTE release 8. The sequence length of the primary synchronization sequence in LTE release 8 is 63, and then the value of the subcarrier position at the center dc position of the carrier is cut off to adopt the final 62-long sequence.

In an implementation manner of the embodiment of the present invention, on the carrier of the present invention, the primary synchronization sequence may adopt a sequence with a length of 61, so that the LTE carrier of the low version and the LTE carrier of the subsequent evolution can be distinguished.

In another implementation manner of the embodiment of the present invention, the original sequence length of the candidate sequence is equal to the sequence length of the primary synchronization sequence in LTE release 8, but the actual length of the candidate sequence is determined after the primary synchronization signal is punctured, for example, 2 or 3 subcarriers are punctured.

At this time, the structure of the primary synchronization is consistent with that of the LTE system of release 8. In order to distinguish the carrier types, the candidate sequence space can be expanded, i.e. the carrier types are distinguished by newly designing the number of sequences, and the carrier types can also be distinguished by other ways, such as indicated by a broadcast channel. The function of distinguishing the carrier types is that the new carrier can adopt a plurality of candidate access resources, and the original carrier type, namely the carrier of the low-version LTE system, only has the resource of the carrier center.

Taking fig. 2 as an example, 5 candidate access resources exist in the maximum bandwidth of 20MHz, and therefore, the synchronization signal of the current cell may adopt 5 different candidate sequences in sequence groups 0 to 4, and none of the respective sequences overlap. The candidate sequences of sequence set 0 to 4 correspond to candidate access resources 1 to 5, respectively, e.g. the candidate sequence of sequence set 0 corresponds to candidate access resource 1, the candidate sequence of sequence set 1 corresponds to candidate access resource 2, etc. The candidate sequence may be a complete sequence, such as a length 61 ZC sequence; alternatively, the candidate sequence may be a sequence fragment of a complete sequence, for example, in fig. 2, the candidate sequence may be a sequence fragment with a length of 61 in a long sequence with a length of at least 61 × 5, and there are 5 sequence fragments with a length of 61 in the long sequence, which correspond to candidate access resources 1 to 5, respectively.

The plurality of candidate access resources for transmitting the synchronization signal and the plurality of candidate sequences for transmitting the synchronization signal may be defined by a protocol, may be defined by an operator, or may be notified to the UE by the base station through broadcast signaling. In addition, the candidate sequence of the synchronization signal transmitted by the base station may also be used to indicate the candidate access resource, and specifically, the candidate sequence may be used to indicate the identity of the candidate access resource or the resource location relationship between the candidate access resource and the resource in which the current cell is located.

Secondly, a synchronization signal is transmitted in an actual sequence on the actual access resource.

After selecting the actual access resource and the actual sequence, the base station can send the synchronization signal.

In addition, the base station may also transmit a broadcast channel in the current cell after transmitting the synchronization signal in the actual sequence on the actual access resource. The broadcast channel carries bandwidth indication information of the current cell, and the bandwidth indication information of the current cell is used for indicating the bandwidth of the current cell.

For example, in the embodiment shown in fig. 2, after the synchronization signal is transmitted with the candidate access resource 2 and the candidate sequence 1, the base station may further transmit a broadcast channel in the current cell, where the broadcast channel carries bandwidth indication information of the current cell, for example, a bandwidth indication code of 20M or 20M in representation.

In addition, after the synchronization signal is transmitted in the actual sequence on the actual access resource, the base station may also transmit different random configuration information according to different actual access resources. For example, assuming that the base station respectively transmits the synchronization signal of the current cell on the candidate access resource 1 and the candidate access resource 2 shown in fig. 2, the base station may transmit the first random configuration information on the broadcast channel resource or the common channel resource corresponding to the candidate access resource 1, and transmit the second random configuration information on the broadcast channel resource or the common channel resource corresponding to the candidate access resource 2. In this way, the UE can distinguish different random configuration information according to different access resource locations of the received random configuration information.

In addition, after transmitting the synchronization signal in the actual sequence on the actual access resource, the base station may also transmit a second reference signal on the resource location of the actual access resource.

In an implementation manner of the embodiment of the present invention, the second reference signal is a reference signal segment corresponding to the resource location truncated from the first reference signal, and the first reference signal is a reference signal generated by taking a central frequency point of the current cell as a center and taking the number of resource blocks included in a bandwidth of the current cell as a frequency domain width. Taking fig. 3 as an example, the base station may send the first reference signal on the whole cell resource of the current cell, where the second reference signal corresponding to the actual access resource is a partial reference signal corresponding to the actual access resource in the first reference signal.

In another implementation manner of the embodiment of the present invention, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width. Taking fig. 3 and 4 as an example, the first reference signal shown in fig. 3 is a reference signal sent by the base station when the actual access resource is at the center frequency point of the current cell, the first reference signal shown in fig. 4 is a reference signal sent by the base station when the actual access resource is not at the center frequency point of the current cell, the second reference signal corresponding to the actual access resource in the first reference signal in fig. 4 is the same as the reference signal corresponding to the access resource at the center frequency point in fig. 3, and the first reference signal in fig. 4 is obtained after the first reference signal in fig. 3 is cyclically shifted.

Fig. 8 is a flowchart of another method for acquiring cell access resources according to an embodiment of the present invention. The method of fig. 8 is performed by a UE.

801, a UE determines at least one candidate sequence of a synchronization signal of an access cell of the UE and a plurality of candidate access resources of the access cell.

The UE detects the synchronization signal according to the at least one candidate sequence 802.

803, the UE receives the broadcast channel of the access cell on the broadcast channel resource corresponding to the actual access resource where the synchronization signal is detected.

The actual access resource is one of the candidate access resources, the broadcast channel carries resource indication information, the resource indication information is used for indicating an actual access resource in the candidate access resources, or the resource indication information is used for indicating a position relationship between the actual access resource and a resource where the access cell is located.

And 804, the UE determines the resource location of the actual access resource in the access cell according to the resource indication information.

In the embodiment of the invention, the resource position of the actual access resource in the access cell is determined by detecting the actual access resource of the synchronization signal and the resource indication information received on the broadcast channel, so that the interference influence on the access of the UE caused by the intensive cell can be avoided to a certain extent, the inter-cell interference of the common control channel is coordinated, and the detection performance of the common control channel is improved.

Optionally, as an embodiment, when the resource indication information is used to indicate an actual access resource in the multiple candidate access resources, each candidate access resource in the multiple candidate access resources has a corresponding location relationship with a resource in which the access cell is located, step 804 may be specifically implemented as: the UE determines actual access resources in the candidate access resources according to the resource indication information; and the UE determines the resource position of the actual access resource in the access cell according to the corresponding position relation between each candidate access resource in the candidate access resources and the resource of the access cell.

Optionally, as another embodiment, when the resource indication information is used to indicate a location relationship between the actual access resource and the resource of the access cell, step 804 may be specifically implemented as: and the UE determines the resource position of the actual access resource in the access cell according to the position relationship between the actual access resource and the resource of the access cell indicated by the resource indication information.

Optionally, after step 804, the method further comprises: and the UE determines the cell identification of the access cell according to the resource position of the actual access resource in the access cell and the actual sequence of the detected synchronous signal.

Optionally, after step 804, the method further comprises: if the actual access resource comprises a first actual access resource and a second actual access resource, the UE respectively acquires a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

Optionally, as an embodiment, after step 804, the method further includes: the UE determines a second reference signal at a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width.

Optionally, as another embodiment, after step 804, the method further includes: the UE determines a second reference signal at a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

Optionally, after step 804, the method further comprises: if the resource location of the actual access resource is not the frequency domain center location of the access cell, the UE treats the subcarrier in the actual access resource center as a virtual dc subcarrier when resolving the resource block partition in the actual access resource. Further, the broadcast channel resource corresponding to the actual access resource is located on a predefined side of the central frequency point of the actual access resource.

The method of the embodiments of the present invention will be described with reference to specific embodiments.

In embodiment 3 of the present invention, the UE determines the resource location of the actual access resource in the access cell according to the location relationship of the actual access resource in the resource of the cell and the resource indication information in the broadcast channel.

First, before detecting the synchronization signal, the UE may determine at least one candidate sequence of the synchronization signal of the UE and a plurality of candidate access resources of the access cell. The at least one candidate sequence is a candidate sequence adopted when the access cell of the UE sends the synchronization signal, the multiple candidate access resources are possibly used by the access cell of the UE, the resource where the access cell is located refers to the resource of the whole carrier where the access cell is located, and each candidate access resource in the multiple candidate access resources has a corresponding position relation with the resource where the access cell is located.

Taking an access cell with a carrier bandwidth of 20MHz and including 100 resource blocks as an example, it is not assumed that there are 5 candidate access resources in the access cell, and each candidate access resource occupies 6 resource blocks, and then the corresponding position relationship of the 5 candidate access resources on the 20MHz carrier may be preset, for example, there is one candidate access resource in the center of the carrier, and each predefined position on both sides of the center frequency point of the carrier includes two candidate access resources.

The position relationship of the candidate access resource in the resource of the access cell may be a frequency band distance of a resource position of the candidate access resource relative to a center frequency point position of the access cell, or a frequency band distance of a resource position of the candidate access resource relative to a lowest frequency position of the access cell, or a frequency band distance of a resource position of the candidate access resource relative to a highest frequency position of the access cell, as long as the position relationship is preset, and is not particularly limited.

The plurality of candidate access resources of the UE may include candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the access cell, where N is a pre-configured natural number, and may be specified by a protocol or according to a policy of an operator. For example, in fig. 2, candidate access resource 1 is a first candidate access resource, and occupies 1.4MHz, that is, the frequency domain width of 6 resource blocks; in fig. 2, the candidate access resources of the UE include, in addition to candidate access resource 1, candidate access resources 2 to candidate access resource 5, and the position relationship of the candidate access resources in the entire carrier resource where the access cell is located is preset.

In this embodiment of the present invention, at least one candidate access resource of an access cell may be predefined, for example, defined according to a maximum carrier bandwidth, and a specific carrier bandwidth may be smaller than or equal to the maximum carrier bandwidth. For example, each candidate access resource can satisfy the condition that the center frequency point is on a grid of 100KHz, so that the UE can conveniently search the cell, namely detect the synchronous signal. Taking fig. 2 as an example, the maximum bandwidth is 20MHz, and there are 5 candidate access resources: candidate access resource 1 to candidate access resource 5. If the actual bandwidth is 10MHz, the actual candidate access resources are 3, but the UE may also assume 5 candidate access resources to detect before acquiring the bandwidth information, and finally determine 1 or more candidate access resources from the middle 3 candidate access resources, that is, the candidate access resource set under the large bandwidth condition includes the candidate access resource set under the small bandwidth condition, so that the detection complexity may be simplified, and the inclusion of different bandwidth system designs may be maintained.

In the embodiment of the invention, the candidate sequence can be a Zadoff-Chu sequence or an m sequence and the like. Of course, the possibility of using other sequences is not excluded. Preferably, the candidate sequence in the practice of the present invention may be a Zadoff-Chu sequence. The original sequence length of the candidate sequence may be smaller than the sequence length of the primary synchronization sequence in LTE release 8. The sequence length of the primary synchronization sequence in LTE release 8 is 63, and then the value of the subcarrier position at the center dc position of the carrier is cut off to adopt the final 62-long sequence.

In an implementation manner of the embodiment of the present invention, on the carrier of the present invention, the primary synchronization sequence may adopt a sequence with a length of 61, so that the LTE carrier of the low version and the LTE carrier of the subsequent evolution can be distinguished.

In another implementation manner of the embodiment of the present invention, the original sequence length of the candidate sequence is equal to the sequence length of the primary synchronization sequence in LTE release 8, but the actual length of the candidate sequence is determined after the primary synchronization signal is punctured, for example, 2 or 3 subcarriers are punctured.

At this time, the structure of the primary synchronization is consistent with that of the LTE system of release 8. In order to distinguish the carrier types, the candidate sequence space can be expanded, i.e. the carrier types are distinguished by newly designing the number of sequences, and the carrier types can also be distinguished by other ways, such as indicated by a broadcast channel. The function of distinguishing the carrier types is that the new carrier can adopt a plurality of candidate access resources, and the original carrier type, namely the carrier of the low-version LTE system, only has the access resource of the carrier center.

Secondly, the UE detects the synchronization signal according to the at least one candidate sequence.

The UE detects a synchronization signal according to the candidate sequence. When the UE detects the synchronization signal and the actual sequence of the synchronization signal is one of the at least one candidate sequence, it may be considered that the UE detects the synchronization signal of the access cell, and the detected candidate sequence is an actual sequence of the synchronization signal of the access cell. Furthermore, one access cell may also transmit multiple actual sequences, which are transmitted on multiple candidate access resources, respectively, so that the UE may detect multiple actual sequences.

And thirdly, the UE receives the broadcast channel of the access cell on the broadcast channel resource corresponding to the actual access resource where the synchronous signal is detected.

After the UE detects the synchronization signal, the access resource where the synchronization signal is located is the actual access resource.

And the UE receives the broadcast channel of the access cell on the broadcast channel resource corresponding to the actual access resource. The broadcast channel carries resource indication information, where the resource indication information indicates an actual access resource in the multiple candidate access resources, and the resource indication information may specifically be information that can distinguish the candidate access resources, such as identifiers and codes of the candidate access resources. For example, the resource indication information is "010", which indicates the candidate access resource 2 in fig. 2, or the relative position relationship of the candidate access resource 2 with respect to the access cell.

The broadcast channel resource corresponding to the actual access resource may be understood that the resource occupied by the broadcast channel is a subset of the actual access resource, or a relatively fixed position relationship exists between the resource where the broadcast channel is located and the actual access resource, and the correspondence relationship is not limited.

The UE receives a broadcast channel, which may be a physical broadcast channel or a future enhanced physical broadcast channel, without limitation. The UE may obtain resource indication information carried in the broadcast channel, where the resource indication information may be carried by bits, scrambling codes, time-frequency resource positions, and the like in the broadcast channel, and is not limited herein.

And finally, the UE determines the resource position of the actual access resource in the access cell according to the corresponding position relation between each candidate access resource in the candidate access resources and the resource of the access cell.

For example, when the UE receives the resource indication information of "010", according to the actual access resource and the resource indication information, the UE may determine that the actual access resource corresponds to the candidate access resource 2, and then determine the resource location of the actual access resource in the access cell according to the location relationship of the actual access resource in the resource of the cell.

In addition, the resource indication information may further include bandwidth information of the access cell, and the UE may further determine the bandwidth of the access cell according to the bandwidth information of the access cell in the resource indication information.

In addition, the UE may also determine the cell identifier of the access cell according to the resource location of the actual access resource in the access cell and the sequence of the synchronization signal.

In the existing system, after detecting the synchronization signal of the carrier from the carrier center, the UE can obtain the cell identifier of the carrier according to the sequence information of the synchronization signal, and the value range is from 0 to 503. After a plurality of candidate access resources are introduced, the value space of the cell identifier can be expanded to adapt to denser cell deployment scenes in the future and solve the problem of cell identifier conflict. For example, the cell identity of the access cell is determined by the resource location of the actual access resource and the sequence of the synchronization signal. Specifically, assuming that the value space size of the cell identifier carried by the sequence is also 504, the value space of the cell identifier may be further expanded according to the resource position of the first access resource in the carrier, and assuming that there are 5 candidate access resources on the carrier, the space may be expanded to 504 × 5, that is, the position information of each candidate access resource may provide an expansion degree of freedom. For example, of the 5 candidate access resources shown in fig. 2, candidate access resource 1 may correspond to cell identities 0 to 503, candidate access resource 2 may correspond to cell identities 504 to 1007, and so on, and candidate access resource 5 may correspond to cell identities 504 x 4 to 504 x 5-1.

In addition, the UE may also obtain different random access configurations of the access cell according to different actual access resources, and the specific method may refer to the method for the UE to obtain different random access configurations of the access cell according to different actual access resources in embodiment 1 of the present invention, which is not described herein again.

In addition, the UE may also determine the second reference signal in the resource position of the actual access resource, and the specific method may refer to the method for determining the second reference signal in the resource position of the actual access resource by the UE in embodiment 1 of the present invention, which is not described herein again in this embodiment of the present invention.

In addition, after determining the resource position of the actual access resource of the actual sequence in the access cell, the UE needs to determine the resource that can be used in the actual access resource. If the resource location of the actual access resource is not the frequency domain center location of the access cell, the UE may treat the subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource. For specific implementation, reference may be made to the method for determining, by the UE, the resource that can be used in the actual access resource in embodiment 1 of the present invention, which is not described herein again.

In the embodiment of the invention, the actual access resource is determined through the broadcast channel, so that the synchronization signal can be ensured to be consistent with the previous system, the complexity of the design of the additional synchronization signal is not introduced, the receiving of the broadcast channel has a checking function, and the reliability is better.

In embodiment 4 of the present invention, the UE determines the resource location of the actual access resource in the access cell according to the location relationship between the actual access resource carried in the resource indication information in the broadcast channel and the access cell.

First, before detecting the synchronization signal, the UE may determine at least one candidate sequence of the synchronization signal of the UE and a plurality of candidate access resources of the access cell. In the embodiment of the present invention, whether the candidate access resource has a corresponding location relationship with the resource where the access cell is located is not limited herein.

Taking an access cell with a carrier bandwidth of 20MHz and including 100 resource blocks as an example, it is not assumed that there are 5 candidate access resources in the access cell, and each candidate access resource occupies 6 resource blocks. The position relationship of the 5 candidate access resources on the 20MHz carrier may be preset, or may be randomly determined by the base station, or determined by the base station according to a certain rule.

Secondly, the UE detects the synchronization signal according to the at least one candidate sequence.

The UE detects a synchronization signal according to the candidate sequence. When the UE detects the synchronization signal and the actual sequence of the synchronization signal is one of the at least one candidate sequence, it may be considered that the UE detects the synchronization signal of the access cell, and the detected candidate sequence is an actual sequence of the synchronization signal of the access cell. Furthermore, one access cell may also transmit multiple actual sequences, which are transmitted on multiple candidate access resources, respectively, so that the UE may detect multiple actual sequences.

And thirdly, the UE receives the broadcast channel of the access cell on the broadcast channel resource corresponding to the actual access resource where the synchronous signal is detected.

After the UE detects the synchronization signal, the access resource where the synchronization signal is located is the actual access resource.

And the UE receives the broadcast channel of the access cell on the broadcast channel resource corresponding to the actual access resource. The broadcast channel carries resource indication information, where the resource indication information is used to indicate a position relationship of the actual access resource in multiple candidate access resources of the access cell.

The broadcast channel resource corresponding to the actual access resource may be understood that the resource occupied by the broadcast channel is a subset of the actual access resource, or a relatively fixed position relationship exists between the resource where the broadcast channel is located and the actual access resource, and the correspondence relationship is not limited.

The UE receives a broadcast channel, which may be a physical broadcast channel or a future enhanced physical broadcast channel, without limitation. The UE may obtain resource indication information carried in the broadcast channel, where the resource indication information may be carried by bits, scrambling codes, time-frequency resource positions, and the like in the broadcast channel, and is not limited herein.

The position relationship of the actual access resource indicated by the resource indication information in the candidate access resources of the access cell may be a position relationship of the actual access resource and a center frequency point of the resource where the cell is located, or a position relationship of the actual access resource and a high frequency position of the resource where the cell is located, or a position relationship of the actual access resource and a low frequency position of the resource where the cell is located. In general, the location relationship refers to a location relationship between an actual access resource and a center frequency point of a resource in which the cell is located.

For example, the resource indication information is 1MHZ, which may indicate that the actual access resource is on a resource with a center frequency point of the access cell higher than 1 MHZ; the resource indication information is-1 MHZ, which can indicate that the actual access resource is on the resource 1MHZ lower than the center frequency point of the access cell, and so on. Of course, "001" may also be used to indicate that the actual access resource is on a resource with a central frequency point of the access cell higher than 1MHZ, and "002" may be used to indicate that the actual access resource is on a resource with a central frequency point of the access cell lower than 1 MHZ.

And finally, the UE determines the resource position of the actual access resource in the access cell according to the position relation between the actual access resource indicated by the resource indication information and the resource of the cell.

In addition, the resource indication information may further include bandwidth information of the access cell, and the UE may further determine the bandwidth of the access cell according to the bandwidth information of the access cell in the resource indication information.

In addition, the UE may also determine the cell identifier of the access cell according to the resource location of the actual access resource in the access cell and the sequence of the synchronization signal. For specific implementation, reference may be made to the method in embodiment 3 of the present invention, where the UE determines the cell identifier of the access cell according to the resource location of the actual access resource in the access cell and the sequence of the synchronization signal, and details of the embodiment of the present invention are not repeated here.

In addition, the UE may also obtain different random access configurations of the access cell according to different actual access resources, and for specific implementation, reference may be made to the method for the UE to obtain different random access configurations of the access cell according to different actual access resources in embodiment 1 of the present invention, which is not described herein again in this embodiment of the present invention.

In addition, the UE may also determine the second reference signal in the resource position of the actual access resource, and the specific method may refer to the method for determining the second reference signal in the resource position of the actual access resource by the UE in embodiment 1 of the present invention, which is not described herein again in this embodiment of the present invention.

In addition, after determining the resource position of the actual access resource of the actual sequence in the access cell, the UE needs to determine the resource that can be used in the actual access resource. If the resource location of the actual access resource is not the frequency domain center location of the access cell, the UE may treat the subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource. For specific implementation, reference may be made to the method for determining, by the UE, the resource that can be used in the actual access resource in embodiment 1 of the present invention, which is not described herein again.

In the embodiment of the invention, the actual access resource is determined through the broadcast channel, so that the synchronization signal can be ensured to be consistent with the previous system, the complexity of the design of the additional synchronization signal is not introduced, the receiving of the broadcast channel has a checking function, and the reliability is better.

Fig. 9 is a flowchart of another method for indicating cell access resources according to an embodiment of the present invention. The method of fig. 9 is performed by a base station.

901, the actual access resources of the current cell and the actual sequence of the synchronization signal of the current cell are determined.

Wherein the actual access resource is at least one candidate access resource of a plurality of candidate access resources of the current cell, and the actual sequence is one of at least one candidate sequence of the synchronization signal.

And transmitting the synchronization signal of the current cell on the actual access resource in the actual sequence 902.

903, sending a broadcast channel on the broadcast channel resource corresponding to the actual access resource, where the broadcast channel carries the resource indication information.

The resource indication information is used to indicate an actual access resource in the candidate access resources, or the resource indication information is used to indicate a position relationship between the actual access resource and a resource of the current cell, so that the UE of the current cell can determine a resource position of the actual access resource in the current cell according to the actual access resource and the resource indication information.

In the embodiment of the invention, the resource indication information is sent on the broadcast channel of the actual access resource for sending the synchronization signal, so that the UE side can determine the resource position of the actual access resource in the current cell according to the resource indication information, the interference influence on the UE access caused by the cell concentration can be avoided to a certain extent when the UE is accessed to the current cell, the inter-cell interference of the common control channel is coordinated, and the detection performance of the common control channel is improved.

Optionally, the resource location of the actual access resource in the current cell and the actual sequence of the synchronization signal are also used to represent the cell identity of the current cell.

Optionally, after step 903, the method further comprises: if the actual access resource comprises a first actual access resource and a second actual access resource, respectively sending a first random access configuration and a second random access configuration on a broadcast channel resource or a common channel resource corresponding to the first actual access resource and a broadcast channel resource or a common channel resource corresponding to the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

Optionally, as an embodiment, after step 903, the method further includes: and transmitting a second reference signal at the resource position of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of the frequency domain.

Optionally, as another embodiment, after step 903, the method further includes: and transmitting a second reference signal at the resource position of the actual access resource. The second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

Optionally, after step 903, the method further comprises: and if the resource position of the actual access resource is not the frequency domain center position of the current cell, treating the subcarrier of the actual access resource center as a virtual direct current subcarrier when analyzing the resource block division in the actual access resource. Further, the broadcast channel resource corresponding to the actual access resource is a resource on one predefined side of the central frequency point of the actual access resource.

The method of the embodiments of the present invention will be described below with reference to specific embodiments.

In embodiment 5 of the present invention, the resource indication information sent by the base station on the broadcast channel resource corresponding to the actual access resource can indicate the actual access resource in the multiple candidate access resources of the current cell. The base station sends the resource indication information on the broadcast channel resource corresponding to the actual access resource, so that the UE can avoid the interference influence on the UE access caused by the intensive cell on the premise of analyzing the synchronous signal.

First, the base station may determine the actual access resource and the actual sequence of the good synchronization signal.

There may be multiple candidate access resources for the current cell of the base station. The candidate access resource is an access resource that can be used when the synchronization signal is transmitted, the candidate sequence is a sequence that can be used when the synchronization signal is transmitted, and each of the candidate sequences corresponds to one of the candidate access resources.

Fig. 2 is a schematic diagram illustrating a relationship between a cell carrier and a candidate access resource according to an embodiment of the present invention. As shown in fig. 2, when the cell carrier bandwidth is 20MHz, 5 candidate access resources including candidate access resources 1 to 5 may be included; when the cell carrier bandwidth is 10MHz, 3 candidate access resources including candidate access resources 1 to 3 may be included; when the cell carrier bandwidth is 1.4MHz, only candidate access resource 1 is included. Of course, fig. 2 only shows one possible relation of candidate access resources to the cell carrier, and there may be other possibilities, for example, 9 candidate access resources may be included when the cell carrier bandwidth is 10MHz, and so on.

The plurality of candidate access resources of the base station may include candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the current cell, where N is a pre-configured natural number, and may be specified by a protocol or according to a policy of an operator. For example, in fig. 2, candidate access resource 1 is a first candidate access resource, and occupies 1.4MHz, that is, the frequency domain width of 6 resource blocks; in fig. 2, the candidate access resources of the base station include, in addition to candidate access resource 1, candidate access resources 2 to candidate access resource 5, and the position relationship of the candidate access resources in the entire carrier resource in which the current cell is located is preset.

In this embodiment of the present invention, the at least one candidate access resource of the current cell may be predefined, for example, defined according to a maximum carrier bandwidth, and the specific carrier bandwidth may be smaller than or equal to the maximum carrier bandwidth. For example, each candidate access resource can satisfy the condition that the center frequency point is on a grid of 100KHz, so that the UE can conveniently search the cell, namely detect the synchronous signal. Taking fig. 2 as an example, the maximum bandwidth is 20MHz, and there are 5 candidate access resources: candidate access resource 1 to candidate access resource 5. If the actual bandwidth is 10MHz, the actual candidate access resources are 3.

In addition, when the base station determines the actual access resource, it needs to determine the resource blocks that can be used in the actual access resource according to the position of the actual access resource. If the resource location of the actual access resource is not the frequency domain center location of the current cell, the base station may treat the subcarrier at the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource. The specific implementation of the method can refer to a specific method that a base station processes a subcarrier in the center of the actual access resource as a virtual direct current subcarrier when determining the resource block division in the actual access resource in embodiment 2 of the present invention.

In addition, the candidate sequence of the embodiment of the present invention may be a complete sequence or a fragment sequence of the complete sequence.

In the embodiment of the invention, the candidate sequence can be a Zadoff-Chu sequence or an m sequence and the like. Of course, the possibility of using other sequences is not excluded. Preferably, the candidate sequence in the practice of the present invention may be a Zadoff-Chu sequence. The original sequence length of the candidate sequence may be smaller than the sequence length of the primary synchronization sequence in LTE release 8. The sequence length of the primary synchronization sequence in LTE release 8 is 63, and then the value of the subcarrier position at the center dc position of the carrier is cut off to adopt the final 62-long sequence.

In an implementation manner of the embodiment of the present invention, on the carrier of the present invention, the primary synchronization sequence may adopt a sequence with a length of 61, so that the LTE carrier of the low version and the LTE carrier of the subsequent evolution can be distinguished.

In another implementation manner of the embodiment of the present invention, the original sequence length of the candidate sequence is equal to the sequence length of the primary synchronization sequence in LTE release 8, but the actual length of the candidate sequence is determined after the primary synchronization signal is punctured, for example, 2 or 3 subcarriers are punctured.

At this time, the structure of the primary synchronization is consistent with that of the LTE system of release 8. In order to distinguish the carrier types, the candidate sequence space can be expanded, i.e. the carrier types are distinguished by newly designing the number of sequences, and the carrier types can also be distinguished by other ways, such as indicated by a broadcast channel. The function of distinguishing the carrier types is that the new carrier can adopt a plurality of candidate access resources, and the original carrier type, namely the carrier of the low-version LTE system, only has the resource of the carrier center.

In addition, the base station may also determine an actual access resource of the candidate access resources and a sequence of the synchronization signal according to the cell identifier of the current cell. Specifically, assuming that the value space size of the cell identifier carried by the sequence is also 504, the value space of the cell identifier may be further expanded according to the resource position of the first access resource in the carrier, and assuming that there are 5 candidate access resources on the carrier, the space may be expanded to 504 × 5, that is, the position information of each candidate access resource in the candidate access resources may provide an expansion degree of freedom. For example, of the 5 candidate access resources shown in fig. 2, candidate access resource 1 may correspond to cell identities 0 to 503, candidate access resource 2 may correspond to cell identities 504 to 1007, and so on, and candidate access resource 5 may correspond to cell identities 504 x 4 to 504 x 5-1.

Secondly, the base station may transmit the synchronization signal of the current cell in the actual sequence on the actual access resource.

In the embodiment of the invention, the base station can send the synchronous sequence on the actual access resource after determining the actual access resource and the actual sequence.

Finally, the base station may send the broadcast channel on the broadcast channel resource corresponding to the actual access resource. The broadcast channel carries resource indication information, and the resource indication information is used for indicating actual access resources in the candidate access resources. Specifically, the resource indication information may be identification information of the candidate access resource, or an order number of the candidate access resource, and the like. For example, the resource indication information may indicate the candidate access resource 2 by "010", or indicate the candidate access resource 2 by the sequence number "2".

Therefore, after detecting the actual sequence of the current cell, the UE side can obtain the actual access resource, and then can determine the position of the actual access resource in the current cell according to the resource indication information received on the actual access resource.

In addition, after the synchronization signal is transmitted in the actual sequence on the actual access resource, the base station may also transmit different random configuration information according to different actual access resources. For specific implementation, reference may be made to the method in embodiment 2 of the present invention, in which a base station sends different random configuration information according to different actual access resources, and details of the embodiment of the present invention are not described herein again.

In addition, after transmitting the synchronization signal in the actual sequence on the actual access resource, the base station may also transmit a second reference signal on the resource location of the actual access resource. For specific implementation, reference may be made to the method in embodiment 2 of the present invention, where a base station sends a second reference signal at a resource location of an actual access resource, and details of the embodiment of the present invention are not repeated herein.

In embodiment 6 of the present invention, the resource indication information sent by the base station on the broadcast channel resource corresponding to the actual access resource can indicate the resource location relationship between the actual access resource and the current cell. The base station sends the resource indication information on the broadcast channel resource corresponding to the actual access resource, so that the UE can avoid the interference influence on the UE access caused by the intensive cell on the premise of analyzing the synchronous signal.

First, the base station may determine the actual access resource and the actual sequence of the good synchronization signal.

There may be multiple candidate access resources for the current cell of the base station. The candidate access resource is an access resource that can be used when the synchronization signal is transmitted, the candidate sequence is a sequence that can be used when the synchronization signal is transmitted, and each of the candidate sequences corresponds to one of the candidate access resources.

Fig. 2 is a schematic diagram illustrating a relationship between a cell carrier and a candidate access resource according to an embodiment of the present invention. As shown in fig. 2, when the cell carrier bandwidth is 20MHz, 5 candidate access resources including candidate access resources 1 to 5 may be included; when the cell carrier bandwidth is 10MHz, 3 candidate access resources including candidate access resources 1 to 3 may be included; when the cell carrier bandwidth is 1.4MHz, only candidate access resource 1 is included. Of course, fig. 2 only shows one possible relation of candidate access resources to the cell carrier, and there may be other possibilities, for example, 9 candidate access resources may be included when the cell carrier bandwidth is 10MHz, and so on.

The plurality of candidate access resources of the base station may include candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the current cell, where N is a pre-configured natural number, and may be specified by a protocol or according to a policy of an operator. For example, in fig. 2, candidate access resource 1 is a first candidate access resource, and occupies 1.4MHz, that is, the frequency domain width of 6 resource blocks; in fig. 2, the candidate access resources of the base station include, in addition to candidate access resource 1, candidate access resources 2 to candidate access resource 5, and the position relationship of the candidate access resources in the entire carrier resource in which the current cell is located is preset.

In this embodiment of the present invention, the at least one candidate access resource of the current cell may be predefined, for example, defined according to a maximum carrier bandwidth, and the specific carrier bandwidth may be smaller than or equal to the maximum carrier bandwidth. For example, each candidate access resource can satisfy the condition that the center frequency point is on a grid of 100KHz, so that the UE can conveniently search the cell, namely detect the synchronous signal. Taking fig. 2 as an example, the maximum bandwidth is 20MHz, and there are 5 candidate access resources: candidate access resource 1 to candidate access resource 5. If the actual bandwidth is 10MHz, the actual candidate access resources are 3.

In addition, when the base station determines the actual access resource, it needs to determine the resource blocks that can be used in the actual access resource according to the position of the actual access resource. If the resource location of the actual access resource is not the frequency domain center location of the current cell, the base station may treat the subcarrier at the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource. The specific implementation of the method can refer to a specific method that a base station processes a subcarrier in the center of the actual access resource as a virtual direct current subcarrier when determining the resource block division in the actual access resource in embodiment 2 of the present invention.

In addition, the candidate sequence of the embodiment of the present invention may be a complete sequence or a fragment sequence of the complete sequence.

In the embodiment of the invention, the candidate sequence can be a Zadoff-Chu sequence or an m sequence and the like. Of course, the possibility of using other sequences is not excluded. Preferably, the candidate sequence in the practice of the present invention may be a Zadoff-Chu sequence. The original sequence length of the candidate sequence may be smaller than the sequence length of the primary synchronization sequence in LTE release 8. The sequence length of the primary synchronization sequence in LTE release 8 is 63, and then the value of the subcarrier position at the center dc position of the carrier is cut off to adopt the final 62-long sequence.

In an implementation manner of the embodiment of the present invention, on the carrier of the present invention, the primary synchronization sequence may adopt a sequence with a length of 61, so that the LTE carrier of the low version and the LTE carrier of the subsequent evolution can be distinguished.

In another implementation manner of the embodiment of the present invention, the original sequence length of the candidate sequence is equal to the sequence length of the primary synchronization sequence in LTE release 8, but the actual length of the candidate sequence is determined after the primary synchronization signal is punctured, for example, 2 or 3 subcarriers are punctured.

At this time, the structure of the primary synchronization is consistent with that of the LTE system of release 8. In order to distinguish the carrier types, the candidate sequence space can be expanded, i.e. the carrier types are distinguished by newly designing the number of sequences, and the carrier types can also be distinguished by other ways, such as indicated by a broadcast channel. The function of distinguishing the carrier types is that the new carrier can adopt a plurality of candidate access resources, and the original carrier type, namely the carrier of the low-version LTE system, only has the resource of the carrier center.

In addition, the base station can also determine the position relation between the actual access resource and the current cell and the sequence of the synchronization signal of the current cell according to the cell identification of the current cell. Specifically, assuming that the value space size of the cell identifier carried by the sequence is also 504, the value space of the cell identifier may be further expanded according to the resource position of the first access resource in the carrier, and assuming that there are 5 candidate access resources on the carrier, which respectively correspond to 5 location relationships of the current cell, the space may be expanded to 504 × 5, that is, the location information of each candidate access resource in the multiple candidate access resources may provide an expansion degree of freedom. For example, in the 5 candidate access resources shown in fig. 2, the position relationship between candidate access resource 1 and the current cell may correspond to cell identifiers 0 to 503, the position relationship between candidate access resource 2 and the current cell may correspond to cell identifiers 504 to 1007, and so on, and the position relationship between candidate access resource 5 and the current cell may correspond to cell identifiers 504 × 4 to 504 × 5-1.

Secondly, the base station may transmit the synchronization signal of the current cell in the actual sequence on the actual access resource.

In the embodiment of the invention, the base station can send the synchronous sequence on the actual access resource after determining the actual access resource and the actual sequence.

Finally, the base station may send the broadcast channel on the broadcast channel resource corresponding to the actual access resource. The broadcast channel carries resource indication information, and the resource indication information is used for indicating the position relationship between the actual access resource and the current cell. Specifically, the resource indication information may be a specific location relationship, or an identifier corresponding to the location relationship, and the like. For example, the resource indication information may indicate a resource location 10MHz higher than the current cell center frequency by "001", or a resource location 10MHz higher than the current cell center frequency by "10".

Therefore, after detecting the actual sequence of the current cell, the UE side can obtain the actual access resource, and then can determine the position of the actual access resource in the current cell according to the resource indication information received on the actual access resource.

In addition, after the synchronization signal is transmitted in the actual sequence on the actual access resource, the base station may also transmit different random configuration information according to different actual access resources. For specific implementation, reference may be made to the method in embodiment 2 of the present invention, in which a base station sends different random configuration information according to different actual access resources, and details of the embodiment of the present invention are not described herein again.

In addition, after transmitting the synchronization signal in the actual sequence on the actual access resource, the base station may also transmit a second reference signal on the resource location of the actual access resource. For specific implementation, reference may be made to the method in embodiment 2 of the present invention, where a base station sends a second reference signal at a resource location of an actual access resource, and details of the embodiment of the present invention are not repeated herein.

Fig. 10 is a schematic structural diagram of a user equipment 1000 according to an embodiment of the present invention. The user equipment 1000 may comprise a determining unit 1001 and a detecting unit 1002.

A determining unit 1001 may be configured to determine at least one candidate sequence of a synchronization signal of an access cell of the ue and a plurality of candidate access resources of the access cell.

Wherein each candidate access resource in the candidate access resources has a corresponding position relation with the resource where the access cell is located, and any candidate sequence in the at least one candidate sequence corresponds to one of the candidate access resources.

A detecting unit 1002, configured to detect the synchronization signal according to the at least one candidate sequence.

The determining unit 1001 may further be configured to determine, according to a positional relationship between each candidate access resource of the multiple candidate access resources and the resource of the access cell and a corresponding relationship between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource corresponding to the detected actual sequence in the access cell.

Wherein the actual sequence is one of the at least one candidate sequence, and the actual access resource is one of the candidate access resources.

In the embodiment of the present invention, the UE 1000 determines the resource location of the resource of the actual access resource in the access cell according to the position relationship between the candidate access resource and the resource of the access cell and the detected actual sequence of the synchronization signal, so as to avoid interference influence on UE access caused by cell density to a certain extent, coordinate inter-cell interference of the common control channel, and improve the detection performance of the common control channel.

In addition, the actual access resource is determined through the sequence detection of the synchronous signal, and the synchronous signal detection is the first step of carrier discovery of the UE, so that the UE can determine the access resource at the earliest, and does not need to further read other messages, such as a broadcast channel, to determine the access resource for other signals on the resource, such as a reference signal for measurement and the like, thereby simplifying the steps of system discovery and access, and also not needing to read the broadcast message when measurement is performed, thereby improving the time efficiency and the power efficiency.

Optionally, the determining unit is specifically configured to determine, according to a positional relationship between each candidate access resource of the multiple candidate access resources and the resource of the access cell and a corresponding relationship between any candidate sequence of the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource in the access cell, where the actual access resource corresponds to the detected actual sequence, where the determining unit is configured to: determining an actual access resource corresponding to the actual sequence from the plurality of candidate access resources; and determining the resource position of the actual access resource in the access cell according to the position relation of the candidate access resources and the resource of the access cell.

Alternatively, the candidate sequence may be a complete sequence, or the candidate sequence may be a fragment sequence of a complete sequence.

Optionally, there is at least one candidate access resource in the plurality of candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the access cell, where N is a pre-configured natural number, for example, N is equal to 6. In addition, N may be specified by a protocol, or according to an operator's policy.

Optionally, the determining unit 1001 is further configured to determine the center frequency point position of the access cell according to the resource position of the actual access resource in the access cell.

The user equipment 1000 may further comprise a receiving unit 1003.

Optionally, the receiving unit 1003 may be configured to receive a broadcast channel of the access cell, and the determining unit 1001 is further configured to determine the bandwidth of the access cell according to the bandwidth indication information. Wherein, the broadcast channel carries the bandwidth indication information of the access cell.

Optionally, the receiving unit 1003 may be configured to, if the actual access resource includes a first actual access resource and a second actual access resource, respectively obtain a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, where the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

Optionally, the determining unit 1001 is further configured to determine a second reference signal on the resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

Optionally, the determining unit 1001 is further configured to treat the subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining the resource block division in the actual access resource, if the resource location of the actual access resource is not the frequency domain center location of the access cell.

Fig. 11 is a schematic structural diagram of a base station 1100 according to an embodiment of the present invention. The base station 1100 may include a determining unit 1101 and a transmitting unit 1102.

A determining unit 1101, configured to determine an actual access resource of a current cell under a base station and an actual sequence of a synchronization signal of the current cell. The actual access resource is at least one of candidate access resources used by the current cell to transmit a synchronization signal, the actual sequence is one of at least one candidate sequence of the synchronization signal, and any one of the at least one candidate sequence corresponds to one of the candidate access resources.

A sending unit 1102, configured to send the synchronization signal in the actual sequence on the actual access resource.

In the embodiment of the present invention, the base station 1100 sends the synchronization signal in the actual access resource by the actual sequence according to the corresponding relationship between the sequence for sending the synchronization signal and the candidate access resource of the synchronization signal, so that the UE can determine the resource position of the actual access resource in the current cell according to the actual sequence, the actual access resource and the relative position relationship between the candidate access resource indicated by the actual sequence and the current cell, so that the UE can avoid the interference influence on the UE access caused by the cell density to a certain extent when accessing the current cell, coordinate the inter-cell interference of the common control channel, and improve the detection performance of the common control channel.

Optionally, one of the at least one candidate sequence is a complete sequence; alternatively, one of the at least one candidate sequence is a fragment sequence of the complete sequence.

Optionally, there is at least one candidate access resource in the plurality of candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with frequency domain widths of the central N resource blocks of the current cell, where N is a pre-configured natural number. In addition, N may be specified by a protocol, or according to an operator's policy.

Optionally, the sending unit 1102 is further configured to send a broadcast channel in the current cell. The broadcast channel carries bandwidth indication information of the current cell, and the bandwidth indication information of the current cell is used for indicating the bandwidth of the current cell.

Optionally, the sending unit 1102 is further configured to send, if the actual access resource includes a first actual access resource and a second actual access resource, the first random access configuration of the current cell on the broadcast channel resource or the common channel resource corresponding to the first actual access resource, and send the second random access configuration of the current cell on the broadcast channel resource or the common channel resource corresponding to the second actual access resource.

The sending unit 1102 is further configured to send a second reference signal at the resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of a frequency domain; or, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

Optionally, when determining the actual access resource of the current cell, the determining unit 1101 is specifically configured to: and if the resource position of the actual access resource is not in the frequency domain center position of the current cell, treating the subcarrier in the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

Fig. 12 is a schematic structural diagram of a user equipment 1200 according to an embodiment of the present invention. The user device 1200 may comprise a determining unit 1201, a detecting unit 1202 and a receiving unit 1203.

A determining unit 1201, configured to determine at least one candidate sequence of a synchronization signal of an access cell and a plurality of candidate access resources of the access cell.

A detecting unit 1202, configured to detect the synchronization signal according to the at least one candidate sequence.

A receiving unit 1203 is configured to receive a broadcast channel of the access cell on a broadcast channel resource corresponding to the actual access resource where the synchronization signal is detected. The actual access resource is one of the candidate access resources, the broadcast channel carries resource indication information, the resource indication information is used for indicating an actual access resource in the candidate access resources, or the resource indication information is used for indicating a position relationship between the actual access resource and a resource where the access cell is located.

The determining unit 1201 is further configured to determine a resource location of the actual access resource in the access cell according to the resource indication information.

In the embodiment of the present invention, the UE 1200 determines the resource location of the actual access resource in the access cell by detecting the actual access resource of the synchronization signal and the resource indication information received on the broadcast channel, so as to avoid interference influence on UE access caused by cell density to a certain extent, coordinate inter-cell interference of the common control channel, and improve the detection performance of the common control channel.

Optionally, as an embodiment, when the resource indication information is used to indicate an actual access resource in the multiple candidate access resources, each candidate access resource in the multiple candidate access resources has a corresponding location relationship with a resource in which the access cell is located, and the determining unit 1201 is specifically configured to determine, according to the resource indication information, a resource location of the actual access resource in the access cell: and determining the actual access resource in the candidate access resources according to the resource indication information, and determining the resource position of the actual access resource in the access cell according to the corresponding position relation between each candidate access resource in the candidate access resources and the resource in which the access cell is located.

Optionally, as another embodiment, when the resource indication information is used to indicate a location relationship between the actual access resource and a resource of the access cell, the determining unit 1201 is specifically configured to determine, according to the resource indication information, a resource location of the actual access resource in the access cell, and to: and determining the resource position of the actual access resource in the access cell according to the position relationship between the actual access resource and the resource of the access cell indicated by the resource indication information.

Optionally, the determining unit 1201 is further configured to determine the cell identifier of the access cell according to the resource location of the actual access resource in the access cell and the actual sequence of the detected synchronization signal.

Optionally, the receiving unit 1203 is further configured to, if the actual access resource includes a first actual access resource and a second actual access resource, obtain a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, respectively. Wherein the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

Optionally, the determining unit 1201 is further configured to determine a second reference signal at the resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

Optionally, the determining unit 1201 is further configured to, if the resource location of the actual access resource is not the frequency domain center location of the access cell, treat the subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining the resource block division in the actual access resource.

Optionally, the broadcast channel resource corresponding to the actual access resource is a resource on one predefined side of a central frequency point of the actual access resource.

Fig. 13 is a schematic structural diagram of a base station 1300 according to an embodiment of the present invention. The base station 1300 may include a determining unit 1301 and a transmitting unit 1302.

A determining unit 1301, configured to determine an actual access resource of a current cell under a base station and an actual sequence of a synchronization signal of the current cell. Wherein the actual access resource is at least one candidate access resource of a plurality of candidate access resources of the current cell, and the actual sequence is one of at least one candidate sequence of the synchronization signal.

A sending unit 1302, configured to send the synchronization signal of the current cell in the actual sequence on the actual access resource.

The sending unit 1302 is further configured to send a broadcast channel on the broadcast channel resource corresponding to the actual access resource. The broadcast channel carries resource indication information, where the resource indication information is used to indicate an actual access resource in the candidate access resources, or the resource indication information is used to indicate a location relationship between the actual access resource and a resource of the current cell.

In the embodiment of the present invention, the base station 1300 sends the resource indication information on the broadcast channel of the actual access resource that sends the synchronization signal, so that the UE side can determine the resource position of the actual access resource in the current cell according to the resource indication information, and can avoid the interference influence on the UE access caused by the cell density to a certain extent when the UE accesses the current cell, coordinate the inter-cell interference of the common control channel, and improve the detection performance of the common control channel.

Optionally, the resource location of the actual access resource in the current cell and the actual sequence of the synchronization signal are also used to represent the cell identity of the current cell.

Optionally, the sending unit 1302 is further configured to send, if the actual access resource includes a first actual access resource and a second actual access resource, a first random access configuration and a second random access configuration on a broadcast channel resource or a common channel resource corresponding to the first actual access resource and a broadcast channel resource or a common channel resource corresponding to the second actual access resource, respectively, where the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

Optionally, the sending unit 1302 is further configured to send a second reference signal at the resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of a frequency domain; or, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

Optionally, the determining unit 1301 is specifically configured to: and if the resource position of the actual access resource is not the frequency domain center position of the current cell, treating the subcarrier of the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

Optionally, the broadcast channel resource corresponding to the actual access resource is a resource on one predefined side of a central frequency point of the actual access resource.

Fig. 14 is a schematic structural diagram of a user equipment 1400 according to an embodiment of the present invention. The user equipment 1400 may include a processor 1402, a memory 1403, a transmitter 1401, and a receiver 1404.

The receiver 1404, transmitter 1401, processor 1402 and memory 1403 are interconnected by a bus 1406 system. Bus 1406 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 14, but that does not indicate only one bus or one type of bus. In particular applications, transmitter 1401 and receiver 1404 may be coupled to antenna 1405.

A memory 1403 for storing the program. In particular, the program may include program code comprising computer operating instructions. Memory 1403 may include both read-only memory and random access memory, and provides instructions and data to processor 1402. Memory 1403 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk memory.

The processor 1402 executes a program stored in the memory 1403 for determining at least one candidate sequence of the synchronization signal of the access cell of the ue and a plurality of candidate access resources of the access cell, where each candidate access resource of the plurality of candidate access resources has a corresponding location relationship with a resource in which the access cell is located, and any candidate sequence of the at least one candidate sequence corresponds to one of the plurality of candidate access resources. The processor 1402 is further configured to detect the synchronization signal according to the at least one candidate sequence, and determine a resource position of an actual access resource corresponding to the detected actual sequence in the access cell according to a position relationship between each candidate access resource in the plurality of candidate access resources and a resource of the access cell and a corresponding relationship between any candidate sequence in the at least one candidate sequence and the plurality of candidate access resources. Wherein the actual sequence is one of the at least one candidate sequence, and the actual access resource is one of the candidate access resources.

The method executed by the cooperative apparatus according to any embodiment of fig. 1 and embodiment 1 of the present invention may be applied to the processor 1402, or implemented by the processor 1402. The processor 1402 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1402. The Processor 1402 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1403, and the processor 1402 reads the information in the memory 1403, and completes the steps of the above method in combination with the hardware thereof.

In the embodiment of the invention, the user equipment 1400 determines the resource position of the resource of the actual access resource in the access cell according to the position relationship between the candidate access resource and the resource of the access cell and the detected actual sequence of the synchronization signal, so that the interference influence on the UE access caused by the cell concentration can be avoided to a certain extent, the inter-cell interference of the common control channel is coordinated, and the detection performance of the common control channel is improved.

In addition, the actual access resource is determined through the sequence detection of the synchronous signal, and the synchronous signal detection is the first step of carrier discovery of the UE, so that the UE can determine the access resource at the earliest, and does not need to further read other messages, such as a broadcast channel, to determine the access resource for other signals on the resource, such as a reference signal for measurement and the like, thereby simplifying the steps of system discovery and access, and also not needing to read the broadcast message when measurement is performed, thereby improving the time efficiency and the power efficiency.

Optionally, when the processor 1402 is configured to determine, according to a position relationship between each candidate access resource in the multiple candidate access resources and a resource of the access cell, and a correspondence between any candidate sequence in the at least one candidate sequence and the multiple candidate access resources, a resource position of an actual access resource in the access cell, where the actual access resource corresponds to the detected actual sequence, the processor 1402 is specifically configured to: determining an actual access resource corresponding to the actual sequence from the plurality of candidate access resources; and determining the resource position of the actual access resource in the access cell according to the position relation of the candidate access resources and the resource of the access cell.

Alternatively, the candidate sequence may be a complete sequence, or the candidate sequence may be a fragment sequence of a complete sequence.

Optionally, there is at least one candidate access resource in the plurality of candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with a frequency domain width of the central N resource blocks of the access cell, where N is a pre-configured natural number, for example, N is equal to 6. In addition, N may be specified by a protocol, or according to an operator's policy.

Optionally, the processor 1402 is further configured to determine a center frequency point position of the access cell according to a resource position of the actual access resource in the access cell.

Optionally, the receiver 1404 is configured to receive a broadcast channel of the access cell, and the processor 1402 is further configured to determine a bandwidth of the access cell according to the bandwidth indication information. Wherein, the broadcast channel carries the bandwidth indication information of the access cell.

Optionally, the receiver 1404 is operable to obtain a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, respectively, if the actual access resources comprise the first actual access resource and the second actual access resource. Wherein the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

Optionally, the processor 1402 is further configured to determine a second reference signal at a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

Optionally, the processor 1402 is further configured to treat a subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource, if the resource location of the actual access resource is not the frequency domain center location of the access cell.

Fig. 15 is a schematic structural diagram of a base station 1500 according to an embodiment of the present invention. The base station 1500 may include a processor 1502, memory 1503, a transmitter 1501 and a receiver 1504.

The receiver 1504, transmitter 1501, processor 1502 and memory 1503 are interconnected by a bus 1506 system. The bus 1506 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 15, but that does not indicate only one bus or one type of bus. In particular applications, the transmitter 1501 and receiver 1504 may be coupled to an antenna 1505.

The memory 1503 stores programs. In particular, the program may include program code comprising computer operating instructions. The memory 1503 may include read-only memory and random access memory, and provides instructions and data to the processor 1502. Memory 1503 may include high-speed RAM memory and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The processor 1502 executes a program stored in the memory 1503 to determine an actual access resource of a current cell under the base station 1500 and an actual sequence of a synchronization signal of the current cell, and transmit the synchronization signal in the actual sequence on the actual access resource through the transmitter 1501. The actual access resource is at least one of candidate access resources used by the current cell to transmit a synchronization signal, the actual sequence is one of at least one candidate sequence of the synchronization signal, and any one of the at least one candidate sequence corresponds to one of the candidate access resources.

The method executed by the cooperative apparatus according to any embodiment of the invention disclosed in fig. 7 and embodiment 2 of the invention can be applied to the processor 1502, or implemented by the processor 1502. The processor 1502 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1502. The Processor 1502 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1503, and the processor 1502 reads the information in the memory 1503 to complete the steps of the method in combination with the hardware thereof.

In the embodiment of the present invention, the base station 1500 sends the synchronization signal in the actual access resource by the actual sequence according to the corresponding relationship between the sequence for sending the synchronization signal and the candidate access resource of the synchronization signal, so that the UE can determine the resource position of the actual access resource in the current cell according to the actual sequence, the actual access resource and the relative position relationship between the candidate access resource indicated by the actual sequence and the current cell, so that the UE can avoid the interference influence on the UE access caused by the cell density to a certain extent when accessing the current cell, coordinate the inter-cell interference of the common control channel, and improve the detection performance of the common control channel.

Optionally, one of the at least one candidate sequence is a complete sequence; alternatively, one of the at least one candidate sequence is a fragment sequence of the complete sequence.

Optionally, there is at least one candidate access resource in the plurality of candidate access resources other than the first candidate access resource. The first candidate access resource is a resource with frequency domain widths of the central N resource blocks of the current cell, where N is a pre-configured natural number. In addition, N may be specified by a protocol, or according to an operator's policy.

Optionally, the processor 1502 is further configured to transmit a broadcast channel in the current cell via the transmitter 1501. The broadcast channel carries bandwidth indication information of the current cell, and the bandwidth indication information of the current cell is used for indicating the bandwidth of the current cell.

Optionally, the processor 1502 is further configured to send, by the transmitter 1501, the first random access configuration of the current cell on the broadcast channel resource or the common channel resource corresponding to the first actual access resource and send the second random access configuration of the current cell on the broadcast channel resource or the common channel resource corresponding to the second actual access resource, if the actual access resource includes the first actual access resource and the second actual access resource.

Optionally, the processor 1502 is further configured to transmit a second reference signal at a resource location of the actual access resource through the transmitter 1501. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of a frequency domain; or, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

Optionally, when determining the actual access resource of the current cell of the base station 1500, the processor 1502 is specifically configured to: and if the resource position of the actual access resource is not in the frequency domain center position of the current cell, treating the subcarrier in the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

Fig. 16 is a schematic structural diagram of a user equipment 1600 according to an embodiment of the present invention. The user device 1600 may include a processor 1602, a memory 1603, a transmitter 1601, and a receiver 1604.

The receiver 1604, transmitter 1601, processor 1602 and memory 1603 are interconnected by a system of buses 1606. Bus 1606 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 16, but that does not indicate only one bus or one type of bus. In particular applications, the transmitter 1601 and receiver 1604 may be coupled to an antenna 1605.

A memory 1603 for storing the program. In particular, the program may include program code comprising computer operating instructions. Memory 1603 can include read-only memory and random access memory and provides instructions and data to processor 1602. Memory 1603 may comprise high-speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

A processor 1602, executing a program stored in a memory 1603, configured to determine at least one candidate sequence of a synchronization signal of an access cell and a plurality of candidate access resources of the access cell, detect the synchronization signal according to the at least one candidate sequence by a receiver 1704, receive a broadcast channel of the access cell on a broadcast channel resource corresponding to an actual access resource where the synchronization signal is detected by the receiver 1704, where the actual access resource is one of the candidate access resources, and the broadcast channel carries resource indication information, where the resource indication information is used to indicate an actual access resource among the candidate access resources, or the resource indication information is used to indicate a positional relationship between the actual access resource and a resource where the access cell is located; the processor 1602 is further configured to determine a resource location of the actual access resource in the access cell according to the resource indication information.

The method executed by the cooperative apparatus according to any embodiment of fig. 8 of the present invention and embodiments 3 and 4 of the present invention can be applied to the processor 1602, or implemented by the processor 1602. The processor 1602 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method can be implemented by hardware integrated logic circuits or instructions in software form in the processor 1602. The Processor 1602 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1603, and the processor 1602 reads the information in the memory 1603 and completes the steps of the method in combination with the hardware.

In the embodiment of the present invention, the user equipment 1600 determines the resource location of the actual access resource in the access cell by detecting the actual access resource of the synchronization signal and the resource indication information received on the broadcast channel, so as to avoid the interference influence on the access of the UE caused by the cell density to a certain extent, coordinate the inter-cell interference of the common control channel, and improve the detection performance of the common control channel.

Optionally, as an embodiment, when the resource indication information is used to indicate an actual access resource in the multiple candidate access resources, each candidate access resource in the multiple candidate access resources has a corresponding location relationship with a resource in which the access cell is located, and the processor 1602 is specifically configured to: and determining the actual access resource in the candidate access resources according to the resource indication information, and determining the resource position of the actual access resource in the access cell according to the corresponding position relation between each candidate access resource in the candidate access resources and the resource in which the access cell is located.

Optionally, as another embodiment, when the resource indication information is used to indicate a location relationship between the actual access resource and the resource of the access cell, when the processor 1602 is configured to determine the resource location of the actual access resource in the access cell according to the resource indication information, specifically: and determining the resource position of the actual access resource in the access cell according to the position relationship between the actual access resource and the resource of the access cell indicated by the resource indication information.

Optionally, the processor 1602 is further configured to determine the cell identifier of the access cell according to the resource location of the actual access resource in the access cell and the actual sequence of the detected synchronization signal.

Optionally, the processor 1602 is further configured to, if the actual access resource comprises a first actual access resource and a second actual access resource, obtain, by the receiver 1604, a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, respectively. Wherein the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

Optionally, the processor 1602 is further configured to determine a second reference signal at a resource location of the actual access resource. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of the first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the access cell as a center and taking the number of resource blocks included in the bandwidth of the access cell as the frequency domain width.

Optionally, the processor 1602 is further configured to treat a subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining resource block division in the actual access resource, if the resource location of the actual access resource is not the frequency domain center location of the access cell.

Optionally, the broadcast channel resource corresponding to the actual access resource is a resource on one predefined side of a central frequency point of the actual access resource.

Fig. 17 is a schematic structural diagram of a base station 1700 according to an embodiment of the present invention. Base station 1700 may include a processor 1702, memory 1703, a transmitter 1701, and a receiver 1704.

The receiver 1704, transmitter 1701, processor 1702 and memory 1703 are interconnected by a bus 1706 system. Bus 1706 can be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 17, but that does not indicate only one bus or one type of bus. In particular applications, the transmitter 1701 and the receiver 1704 may be coupled to an antenna 1705.

And a memory 1703 for storing programs. In particular, the program may include program code comprising computer operating instructions. Memory 1703 may include both read-only memory and random-access memory, and provides instructions and data to processor 1702. The memory 1703 may include high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

A processor 1702 executes a program stored in a memory 1703 to determine actual access resources of a current cell under a base station and an actual sequence of synchronization signals for the current cell. Wherein the actual access resource is at least one candidate access resource of a plurality of candidate access resources of the current cell, and the actual sequence is one of at least one candidate sequence of the synchronization signal. The processor 1702 is further configured to transmit the synchronization signal of the current cell in the actual sequence on the actual access resource through the transmitter 1701, and transmit a broadcast channel on a broadcast channel resource corresponding to the actual access resource through the transmitter 1701. The broadcast channel carries resource indication information, where the resource indication information is used to indicate an actual access resource in the candidate access resources, or the resource indication information is used to indicate a location relationship between the actual access resource and a resource of the current cell.

The method executed by the cooperative apparatus as disclosed in any embodiment of fig. 9 of the present invention and embodiments 5 and 6 of the present invention can be applied to the processor 1702 or implemented by the processor 1702. The processor 1702 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1702. The Processor 1702 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1703, and the processor 1702 reads the information in the memory 1703 and completes the steps of the above method in combination with the hardware thereof.

In the embodiment of the present invention, the base station 1700 sends the resource indication information on the broadcast channel of the actual access resource that sends the synchronization signal, so that the UE side can determine the resource location of the actual access resource in the current cell according to the resource indication information, and can avoid the interference influence on the UE access caused by the cell density to a certain extent when the UE accesses the current cell, coordinate the inter-cell interference of the common control channel, and improve the detection performance of the common control channel.

Optionally, the resource location of the actual access resource in the current cell and the actual sequence of the synchronization signal are also used to represent the cell identity of the current cell.

Optionally, the processor 1702 is further configured to transmit, by the transmitter 1701, the first random access configuration and the second random access configuration on the broadcast channel resource or common channel resource corresponding to the first actual access resource and the broadcast channel resource or common channel resource corresponding to the second actual access resource, respectively, if the actual access resource includes the first actual access resource and the second actual access resource. Wherein the first random access configuration corresponds to the first actual access resource and the second random access configuration corresponds to the second actual access resource.

Optionally, the processor 1702 is further configured to transmit a second reference signal at a resource location of the actual access resource via the transmitter 1701. The second reference signal is a reference signal segment corresponding to the resource position and truncated from the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the width of a frequency domain; or, the second reference signal is a reference signal segment corresponding to a first frequency domain width truncated from a frequency domain center of a first reference signal, the first frequency domain width is a frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is a cyclic shift of the first reference signal, the first reference signal is a reference signal generated by taking a center frequency point of the current cell as a center and taking the number of resource blocks included in the bandwidth of the current cell as the frequency domain width.

Optionally, when used to determine the actual access resource of the current cell of the base station 1700, the processor 1702 is specifically configured to, if the resource location of the actual access resource is not the frequency domain center location of the current cell, treat the subcarrier in the center of the actual access resource as a virtual dc subcarrier when determining the resource block partition within the actual access resource.

Optionally, the broadcast channel resource corresponding to the actual access resource is a resource on one predefined side of a central frequency point of the actual access resource.

It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (52)

1. A method for indicating cell access resources, comprising:

transmitting a synchronization signal;

sending resource indication information and bandwidth information to user equipment, wherein the resource indication information is used for indicating the position relationship between the actual access resource where the synchronization signal is located and the resource where the current cell of the user equipment is located, the resource where the current cell is located is the resource of the whole carrier where the current cell is located, and the bandwidth information is the bandwidth information of the current cell;

the position relationship between the actual access resource where the synchronization signal is located and the resource where the current cell is located is the frequency range distance of the resource location of the actual access resource relative to the lowest frequency location of the resource where the current cell is located.

2. The method of claim 1, wherein:

the actual access resources include a first actual access resource corresponding to a first random access configuration and a second actual access resource corresponding to a second random access configuration.

3. The method of claim 2, wherein:

the first random access configuration and the second random access configuration are uplink random access configuration information, and the uplink random access configuration information includes a preamble sequence for random access.

4. The method of claim 3, wherein:

the uplink random access configuration information further includes resource configuration information.

5. The method of claim 1, further comprising:

determining an actual sequence of the synchronization signal;

the transmitting synchronization signal includes:

transmitting the synchronization signal of the current cell in the actual sequence on an actual access resource of the current cell.

6. The method of claim 5, wherein:

the actual sequence is a sequence in at least one candidate sequence, and the at least one candidate sequence is a Zadoff-Chu sequence or an m sequence.

7. The method of claim 1, wherein:

the actual access resource is at least one candidate access resource of a plurality of candidate access resources of the current cell.

8. The method of claim 1, wherein:

the resource indication information is carried by a broadcast channel of the current cell, and the broadcast channel is sent on a broadcast channel resource corresponding to the actual access resource.

9. The method of claim 8, wherein the broadcast channel resource is in a positional relationship with the actual access resource.

10. The method of claim 8, wherein the resource indication information is carried by bits in the broadcast channel.

11. A communication apparatus comprising a transmission unit, characterized in that:

the transmitting unit is used for transmitting a synchronous signal;

the sending unit is further configured to send resource indication information and bandwidth information to the user equipment, where the resource indication information is used to indicate a position relationship between an actual access resource where the synchronization signal is located and a resource where a current cell of the user equipment is located, the resource where the current cell is located is a resource of a whole carrier where the current cell is located, and the bandwidth information is bandwidth information of the current cell;

the position relationship between the actual access resource where the synchronization signal is located and the resource where the current cell is located is the frequency range distance of the resource location of the actual access resource relative to the lowest frequency location of the resource where the current cell is located.

12. The apparatus of claim 11, wherein:

the actual access resources include a first actual access resource corresponding to a first random access configuration and a second actual access resource corresponding to a second random access configuration.

13. The apparatus of claim 12, wherein:

the first random access configuration and the second random access configuration are uplink random access configuration information, and the uplink random access configuration information includes a preamble sequence for random access.

14. The apparatus of claim 13, wherein:

the uplink random access configuration information further includes resource configuration information.

15. The apparatus of claim 11, further comprising a processing unit to determine an actual sequence of the synchronization signal;

the sending unit is configured to send the synchronization signal of the current cell in the actual sequence on an actual access resource of the current cell.

16. The apparatus of claim 15, wherein:

the actual sequence is a sequence in at least one candidate sequence, and the at least one candidate sequence is a Zadoff-Chu sequence or an m sequence.

17. The apparatus of claim 11, wherein:

the actual access resource is at least one candidate access resource of a plurality of candidate access resources of the current cell.

18. The apparatus of claim 11, wherein:

The resource indication information is carried by a broadcast channel of the current cell, and the broadcast channel is sent on a broadcast channel resource corresponding to the actual access resource.

19. The apparatus of claim 18, wherein the broadcast channel resource is in a positional relationship with the actual access resource.

20. The apparatus of claim 18, wherein the resource indication information is carried by bits in the broadcast channel.

21. A computer-readable storage medium having stored thereon instructions which, when executed by a computer device, implement the method of any of claims 1-10.

22. An integrated circuit chip, the integrated circuit chip including an integrated logic circuit, wherein:

the integrated logic circuit is configured to implement the method of any of claims 1-10, or,

the integrated circuit chip executes instructions stored in a memory to implement the method of any of claims 1-10.

23. A method for acquiring cell access resources is characterized by comprising the following steps:

the method comprises the steps that User Equipment (UE) determines at least one candidate sequence of a synchronization signal of an access cell of the UE and a plurality of candidate access resources of the access cell, wherein each candidate access resource in the candidate access resources has a corresponding position relation with a resource where the access cell is located, and any candidate sequence in the candidate access resources corresponds to one of the candidate access resources;

The UE detects the synchronization signal according to the at least one candidate sequence;

and the UE determines the resource position of the actual access resource corresponding to the detected actual sequence in the access cell according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources, wherein the actual sequence is one of the candidate sequences, and the actual access resource is one of the candidate access resources.

24. The method of claim 23, wherein the UE determining, according to a positional relationship between each candidate access resource of the candidate access resources and the resource of the access cell and a corresponding relationship between any candidate sequence of the at least one candidate sequence and the candidate access resources, a resource position of an actual access resource in the access cell corresponding to the detected actual sequence comprises:

the UE determines an actual access resource corresponding to the actual sequence from the candidate access resources;

And the UE determines the resource position of the actual access resource in the access cell according to the position relation between the candidate access resources and the resource of the access cell.

25. The method of claim 23 or 24,

the candidate sequence is a complete sequence; or

The candidate sequence is a fragment sequence in the complete sequence.

26. The method of claim 23, wherein at least one candidate access resource other than a first candidate access resource exists among the plurality of candidate access resources, the first candidate access resource being a resource of a center N resource blocks frequency domain width of the access cell, the N being a pre-configured natural number.

27. The method of claim 23, wherein after the UE determines the resource position of the actual access resource in the access cell corresponding to the detected actual sequence according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources, the method further comprises:

And the UE determines the position of the central frequency point of the access cell according to the resource position of the actual access resource in the access cell.

28. The method of claim 23, wherein after the UE determines the resource position of the actual access resource in the access cell corresponding to the detected actual sequence according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources, the method further comprises:

the UE receives a broadcast channel of the access cell, wherein the broadcast channel carries bandwidth indication information of the access cell;

and the UE determines the bandwidth of the access cell according to the bandwidth indication information.

29. The method of claim 23, wherein after the UE determines the resource position of the actual access resource in the access cell corresponding to the detected actual sequence according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources, the method further comprises:

If the actual access resource comprises a first actual access resource and a second actual access resource, the UE respectively acquires a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

30. The method of claim 23, wherein after the UE determines the resource position of the actual access resource in the access cell corresponding to the detected actual sequence according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources, the method further comprises:

the UE determines a second reference signal on a resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and intercepted from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or

The UE determines a second reference signal on the resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to a first frequency domain width intercepted from the frequency domain center of a first reference signal, the first frequency domain width is the frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is the cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width.

31. The method of claim 23, wherein after the UE determines the resource position of the actual access resource in the access cell corresponding to the detected actual sequence according to the position relationship between each candidate access resource in the candidate access resources and the resource of the access cell and the corresponding relationship between any candidate sequence in the at least one candidate sequence and the candidate access resources, the method further comprises:

and if the resource position of the actual access resource is not the frequency domain center position of the access cell, the UE treats the subcarrier of the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

32. A method for indicating cell access resources, comprising:

determining an actual access resource of a current cell and an actual sequence of a synchronization signal of the current cell, wherein the actual access resource is at least one candidate access resource in a plurality of candidate access resources used by the current cell for transmitting the synchronization signal, the actual sequence is one of the at least one candidate sequence of the synchronization signal, and any one of the at least one candidate sequence corresponds to one of the candidate access resources;

transmitting the synchronization signal in the actual sequence on the actual access resource.

33. The method of claim 32,

one of the at least one candidate sequence is a complete sequence; or

One of the at least one candidate sequence is a fragment sequence of the complete sequence.

34. The method of claim 32 or 33,

at least one candidate access resource except for a first candidate access resource exists in the candidate access resources, the first candidate access resource is a resource with the frequency domain width of N resource blocks at the center of the current cell, and N is a pre-configured natural number.

35. The method of claim 32, wherein the method further comprises: and sending a broadcast channel in the current cell, wherein the broadcast channel carries bandwidth indication information of the current cell, and the bandwidth indication information of the current cell is used for indicating the bandwidth of the current cell.

36. The method of claim 32, wherein after transmitting the synchronization signal in the actual sequence on the actual access resource, the method further comprises:

and if the actual access resource comprises a first actual access resource and a second actual access resource, sending a first random access configuration of the current cell on a broadcast channel resource or a common channel resource corresponding to the first actual access resource, and sending a second random access configuration of the current cell on a broadcast channel resource or a common channel resource corresponding to the second actual access resource.

37. The method of claim 32, wherein after transmitting the synchronization signal in the actual sequence on the actual access resource, the method further comprises:

sending a second reference signal at a resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and truncated from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the frequency domain width; or

And sending a second reference signal at the resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to a first frequency domain width intercepted from the frequency domain center of a first reference signal, the first frequency domain width is the frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is the cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the frequency domain width.

38. The method of claim 32, wherein the determining the actual access resources of the current cell comprises: and if the resource position of the actual access resource is not in the frequency domain center position of the current cell, treating the subcarrier of the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

39. A method for acquiring cell access resources is characterized by comprising the following steps:

user Equipment (UE) determines at least one candidate sequence of a synchronization signal of an access cell of the UE and a plurality of candidate access resources of the access cell;

The UE detects the synchronization signal according to the at least one candidate sequence;

the UE receives a broadcast channel of the access cell on a broadcast channel resource corresponding to an actual access resource where the synchronization signal is detected, wherein the actual access resource is one of a plurality of candidate access resources, the broadcast channel carries resource indication information, and the resource indication information is used for indicating the actual access resource in the plurality of candidate access resources;

and the UE determines the resource position of the actual access resource in the access cell according to the resource indication information.

40. The method of claim 39, wherein each of the plurality of candidate access resources has a corresponding positional relationship with a resource in which the access cell is located when the resource indication information is used to indicate an actual access resource of the plurality of candidate access resources,

the UE determines the resource position of the actual access resource in the access cell according to the resource indication information, and the resource position comprises the following steps:

the UE determines actual access resources in the candidate access resources according to the resource indication information;

And the UE determines the resource position of the actual access resource in the access cell according to the corresponding position relation between each candidate access resource in the candidate access resources and the resource of the access cell.

41. The method of claim 39, wherein when the resource indication information is used for indicating a location relationship between the actual access resource and a resource in which the access cell is located,

the UE determines the resource position of the actual access resource in the access cell according to the resource indication information, and the resource position comprises the following steps: and the UE determines the resource position of the actual access resource in the access cell according to the position relation between the actual access resource indicated by the resource indication information and the resource of the access cell.

42. The method according to any of claims 39 to 41, wherein after the UE determines the resource location of the actual access resource in the access cell according to the resource indication information, the method further comprises:

and the UE determines the cell identification of the access cell according to the resource position of the actual access resource in the access cell and the actual sequence of the detected synchronous signal.

43. The method of claim 39, wherein after the UE determines a resource location of the actual access resource in the access cell according to the resource indication information, the method further comprises:

if the actual access resource comprises a first actual access resource and a second actual access resource, the UE respectively acquires a first random access configuration and a second random access configuration on the first actual access resource and the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

44. The method of claim 39, wherein after the UE determines a resource location of the actual access resource in the access cell according to the resource indication information, the method further comprises:

the UE determines a second reference signal on a resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and intercepted from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width; or

The UE determines a second reference signal at the resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to a first frequency domain width intercepted from the frequency domain center of a first reference signal, the first frequency domain width is the frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the access cell is the cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the access cell as the center and the number of resource blocks contained in the bandwidth of the access cell as the frequency domain width.

45. The method of claim 39, wherein the method further comprises: and if the resource position of the actual access resource is not the frequency domain center position of the access cell, the UE treats the subcarrier of the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

46. The method of claim 45, wherein the broadcast channel resource corresponding to the actual access resource is a resource on one predefined side of a center frequency point of the actual access resource.

47. A method for indicating cell access resources, comprising:

determining an actual access resource of a current cell of a user equipment and an actual sequence of a synchronization signal of the current cell, wherein the actual access resource is at least one candidate access resource in a plurality of candidate access resources of the current cell, and the actual sequence is one of the at least one candidate sequence of the synchronization signal;

transmitting a synchronization signal of the current cell in the actual sequence on the actual access resource;

and sending a broadcast channel on a broadcast channel resource corresponding to the actual access resource, wherein the broadcast channel carries resource indication information, and the resource indication information is used for indicating the actual access resource in the candidate access resources.

48. The method of claim 47, wherein the actual access resource location in the current cell and the actual sequence of the synchronization signal are also used to represent a cell identity of the current cell.

49. The method of claim 47 or 48, wherein after said transmitting a broadcast channel on a broadcast channel resource corresponding to said actual access resource, the method further comprises:

If the actual access resource comprises a first actual access resource and a second actual access resource, respectively sending a first random access configuration and a second random access configuration on a broadcast channel resource or a common channel resource corresponding to the first actual access resource and a broadcast channel resource or a common channel resource corresponding to the second actual access resource, wherein the first random access configuration corresponds to the first actual access resource, and the second random access configuration corresponds to the second actual access resource.

50. The method of claim 47, wherein after the transmitting a broadcast channel on the broadcast channel resource corresponding to the actual access resource, the method further comprises:

sending a second reference signal at a resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to the resource position and truncated from a first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the frequency domain width; or

And sending a second reference signal at the resource position of the actual access resource, wherein the second reference signal is a reference signal segment corresponding to a first frequency domain width intercepted from the frequency domain center of a first reference signal, the first frequency domain width is the frequency domain width occupied by the actual access resource, the reference signal in the bandwidth of the current cell is the cyclic shift of the first reference signal, and the first reference signal is a reference signal generated by taking the central frequency point of the current cell as the center and the number of resource blocks contained in the bandwidth of the current cell as the frequency domain width.

51. The method of claim 47, wherein the determining the actual access resources of the current cell comprises: and if the resource position of the actual access resource is not the frequency domain center position of the current cell, treating the subcarrier of the actual access resource center as a virtual direct current subcarrier when determining the resource block division in the actual access resource.

52. The method of claim 51, wherein the broadcast channel resource corresponding to the actual access resource is a resource on one predefined side of a center frequency point of the actual access resource.

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