CN101646244B - Method, device and user equipment for reducing control channel conflicts - Google Patents

Abstract

The present invention relates to the field of communication technology, and discloses a method, device, and user equipment for reducing control channel conflicts. The technical solutions provided by the embodiments of the present invention can make the initial values of iterations of user equipment on at least two carriers different, and accordingly, make The starting positions of the search spaces of the control channels of the user equipment on the at least two carriers are different; therefore, using the technical solution provided by the embodiment of the present invention, the control channels of two or more user equipments can be generated on one carrier When conflicting, the control channels of the two or more user equipments do not collide on at least one other carrier.

Description

Method, device and user equipment for reducing control channel collision

technical field

The present invention relates to the field of communication technology, in particular to a method, device and user equipment for reducing control channel conflicts.

Background technique

The future Advanced Long-Term Evolution (LTE-A: Long Terminal Evolution Advanced) system can support wider bandwidth. One possible way to support wider bandwidth is: carrier aggregation, that is, multiple carriers are scheduled to be used by one user at the same time. . Each carrier is also called a branch carrier and can be a long-term evolution project (LTE: Long Terminal Evolution) carrier, and at this time, terminals supporting LTE can access it. Certainly, some carriers may also be non-LTE carriers, and at this time, LTE terminals cannot access the carriers. In any case, with the carrier aggregation design method, each branch carrier can retain most of the existing LTE design, which can reduce changes to the system side and the terminal side.

Carrier aggregation is used to support wider bandwidth, and resources of multiple carriers are simultaneously scheduled to a user equipment (UE: User Equipment). The LTE-A system is an existing long-term evolution project (LTE: Long Terminal Evolution) system subsequent evolution of the system.

The existing LTE system control channel occupies the first 1 or 2 or 3 symbols in a subframe (subframe) in the time domain, and all time-frequency resources allocated to the control channel in a certain subframe (subcarrier subcarrier*symbol symbol) Divided into multiple basic units: Control Channel Element (CCE: ControlChannel Element). A control channel may contain 1, 2, 4, or 8 CCEs, and the user equipment detects the control channel of this frame in the first few symbols (up to 3) of each subframe. Since a certain user equipment does not know in advance whether there is a control channel for scheduling itself in this frame; if there is a corresponding control channel, it does not know in which time-frequency position it will be placed and how many CCEs it will occupy. possibility of blind detection. In order to reduce the number of times that the user equipment performs blind detection, a search space is planned, and a certain number of CCEs form a search space; control channels composed of four types of CCEs have their own search spaces.

In the prior art, after user equipment is assigned a user equipment identification (UEID: USERSEquipment Identification), the starting point of the search space of a user equipment control channel in each subframe (subframe) k of a radio frame (radio frame) The position is determined by the following two formulas:

Y _k ＝(A*Y _k-1 ) mod D

代表向下取整，例如迭代值Y_k可以看作是随子帧号k变化的迭代值，其中Y-1是迭代初值，一般情况下迭代初值是系统分配给用户设备的UEID或者叫做C-RNTI，等于n_RNTI，迭代初值不为0；L是聚合水平(aggregation level)，N_CCE，k是第k个子帧中系统用于控制信道传输的CCE的总数量；当前子帧的迭代值Y_k是通过前一个子帧的迭代值Y_k-1乘以常数A后对D取模得到的；所以当前子帧的迭代值Y_k是前边K-1个子帧的迭代值进行迭代运算得出的结果；其中mod运算，代表取模，Amod B代表求A/B的余数；Z_k(L)代表在第k个子帧中，如果系统为用户设备标识为n_RNTI的用户设备分配聚合水平为L的控制信道，所述控制信道的搜索空间的起点位置。Among them, A=39827; D=65537;

Represents rounding down, for example The iteration value Y _k can be regarded as an iteration value that changes with the subframe number k, where Y-1 is the iteration initial value. Generally, the iteration initial value is the UEID or C-RNTI assigned to the user equipment by the system, which is equal to n _RNTI , the initial value of the iteration is not 0; L is the aggregation level (aggregation level), N _{CCE, k} is the total number of CCEs used by the system for control channel transmission in the kth subframe; the iteration value of the current subframe Y _k is the The iterative value Y _k-1 of a subframe is obtained by multiplying the constant A by taking the modulus of D; so the iterative value Y _k of the current subframe is the result obtained by iterative operation of the iterative value of the previous K-1 subframes; where mod operation, representing modulus, Amod B represents finding the remainder of A/B; Z _k (L) represents in the kth subframe, if the system allocates a control channel with an aggregation level of L for the user equipment whose user equipment identifier is n _RNTI , the starting position of the search space of the control channel.

用户设备可以确定本帧需要检测的4种聚合水平(aggregation level L)的控制信道的各自搜索空间的起点，根据预先规定好的，各种聚合水平的控制信道对应的搜索空间大小进行搜索和检测。网络侧根据上述的规则和公式安排本子帧调度到的用户设备的控制信道。According to the above formula, it can be obtained that in a radio frame with 10 subframes, the iteration values from the 0th subframe to the 9th subframe are respectively: Y ₀ =(A*Y ₋₁ )mod D, Y ₁ =( A*Y ₀ )mod D,...,Y ₉ =(A*Y ₈ )mod D; at the same time, in each subframe, the number of symbols used for the control channel and the system bandwidth can be determined for the control channel The number of CCEs N _CCE,k , and then according to the formula

The user equipment can determine the starting point of the respective search spaces of the control channels of the four aggregation levels (aggregation level L) that need to be detected in this frame, and perform search and detection according to the pre-specified size of the search spaces corresponding to the control channels of various aggregation levels . The network side arranges the control channel of the user equipment scheduled for this subframe according to the above rules and formulas.

If the system schedules more user equipment with higher aggregation level (larger L value) in this frame, one control channel occupies more time-frequency resources, and may occupy all or part of other low aggregation level (lower L value) ) search space, at this time, if the starting position of the control channel search space of two or more user equipments is the same according to the calculation, and if the size of the search space cannot fully accommodate so many control channels, it may happen that the user equipment in this frame control channel Conflict situation: Some user equipments cannot be scheduled in this frame, because there is no time-frequency position to arrange the control channel, and the scheduling can only be delayed until the subsequent subframe.

In addition, the search space has a certain size and can accommodate two or more control channels, and the search spaces of multiple user equipments are allowed to overlap. Even if the starting positions of the search spaces of the user equipments are different, there may still be partial overlaps. For example: when the aggregation level is 8, the search space of each user equipment can accommodate two control channels, if the search space of user equipment 1 is control channel 1 and 2; the search space of user equipment 2 and user equipment 3 is control channel 2 , 3. Although the starting points of user equipment 1 and 2 search spaces are different, they partially overlap. If the control channel of user equipment 1 is placed in the position of control channel 2, then the control channels of user equipment 2 and 3 must be placed in the position of channel 3. location. At this time, the control channels of user equipment 2 and user equipment 3 conflict. Since the control channel transmitted in each subframe is a combination of 4 possible aggregation levels, the situation will be more complicated and the collision situation will be exacerbated.

In the process of realizing the present invention, the inventors found that the above-mentioned technical solution has at least the following defects: if a user equipment has the same initial iteration value (Y _-1 ) on multiple carriers with equal bandwidth; The number of control channel symbols in this subframe is also the same, that is, N _{CCE, k} is the same, then the starting positions of the search spaces of the control channels of various aggregation levels of the user equipment on each carrier are also the same; if two or For two or more user equipments with different iteration initial values, after calculation according to the above rules, the starting point Z _k (L) of the search space of the control channel is the same or similar. At this time, the control of the above two or more user equipments on each carrier The channels will be the same or similar, which greatly increases the possibility of the above-mentioned various control channel collisions. If the control channels of two or more user equipments collide on multiple carriers, only the above two or more users can be scheduled One of the user equipments in the device, sacrificing the possible high data rate of a part of the user equipment.

Contents of the invention

Embodiments of the present invention provide a method, device, and user equipment for reducing control channel conflicts. Using the technical solutions provided by the embodiments of the present invention, when two or more control channels of user equipments collide on one carrier, the Control channels of two or more user equipments do not collide on at least one other carrier.

The purpose of the embodiments of the present invention is achieved through the following technical solutions:

An embodiment of the present invention provides a method for reducing control channel conflicts, including:

The starting position determining means determines at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier, the user equipment corresponds to the user equipment identifier, and the at least two carriers include the first carrier and the second carrier Carrier, the at least two iteration initial values include a first iteration initial value and a second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial The value corresponds, and the initial value of the first iteration is different from the initial value of the second iteration;

The starting position determining means determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the starting position of the user equipment in the search space of the control channel according to the second iteration initial value. The starting position of the search space of the control channel on the second carrier.

The embodiment of the present invention also provides a device for reducing control channel conflicts, including:

An iteration initial value determining unit, configured to determine at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier, the user equipment corresponds to the user equipment identifier, and the at least two carriers include the first A carrier and a second carrier, the at least two iteration initial values include a first iteration initial value and a second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the The second iteration initial value corresponds, and the first iteration initial value is different from the second iteration initial value;

A start position determining unit, configured to determine the start position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determine the start position of the user equipment according to the second iteration initial value The starting position of the search space of the control channel on the second carrier.

The embodiment of the present invention also provides a network-side device, the network-side device includes the device for reducing the conflict of the control channel provided in the embodiment of the present invention and a transmitting unit, the transmitting unit is used for the transmission of the control channel on the first carrier The search space transmits the control channel of the user equipment on the first carrier, and the search space of the control channel on the second carrier transmits the control channel of the user equipment on the second carrier.

The embodiment of the present invention also provides user equipment, the network side equipment includes the apparatus for reducing control channel conflicts provided in the embodiment of the present invention and a detection unit, the detection unit is used to control the first carrier according to the user equipment The starting position of the search space of the channel, the control channel of the user equipment on the first carrier is detected in the search space of the control channel on the first carrier; according to the position of the user equipment on the second carrier The starting position of the search space of the control channel, the control channel of the user equipment on the second carrier is detected in the search space of the control channel on the second carrier.

It can be seen from the above technical solution provided by the embodiment of the present invention that since the initial value of the first iteration assigned to the user equipment on the first carrier in this embodiment is different from the initial value of the second iteration assigned on the second carrier, even The user equipment collides with the control channel of one or more other user equipments on the first carrier, and because the second iteration initial value of the user equipment on the second carrier is different from the first iteration initial value, the user equipment The starting position of the search space of the control channel on the second carrier will be different from the starting position of the search space of the control channel of the user equipment on the first carrier, thereby avoiding the The control channel on the carrier collides, so that the user equipment and the above-mentioned one or more other user equipment can be scheduled on the second carrier at the same time, which ensures the high data rate of the user equipment and the above-mentioned one or more other user equipment, therefore When the control channels of two or more user equipments collide on the first carrier, the control channels of the above two or more user equipments do not collide on the second carrier.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flowchart of Embodiment 1 of a method for reducing control channel conflicts in an embodiment of the present invention;

FIG. 2 is a flow chart of Embodiment 2 of a method for reducing control channel conflicts in an embodiment of the present invention;

FIG. 3 is a flow chart of Embodiment 3 of a method for reducing control channel conflicts in an embodiment of the present invention;

FIG. 4 is a structural diagram of an embodiment of an apparatus for reducing control channel conflicts in an embodiment of the present invention;

FIG. 5 is a structural diagram of an embodiment of a network side device in an embodiment of the present invention;

Fig. 6 is a structural diagram of an embodiment of user equipment in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

First introduce the two technical solutions provided by the embodiments of the present invention:

First option:

(1) The network side allocates different user equipment identities to the user equipment on at least two carriers.

The network side determines different user equipment identities on at least two carriers for the user equipment, and sends at least one of the user equipment identities to the user;

Wherein, the at least two carriers include a first carrier and a second carrier, and different user equipment identities include a first user equipment identity and a second user equipment identity, the first carrier corresponds to the first user equipment identity, and the second carrier corresponds to the second User equipment identification correspondence;

The different user equipment identifiers in the embodiment of the present invention may be that there is no relationship between the first user equipment identifier and the second user equipment identifier. sent to the user equipment; it may also be that a preset relationship is satisfied between the first user equipment identifier and the second user equipment identifier. For example, in this embodiment of the present invention, the difference between the first user equipment identifier and the second user equipment identifier may be a constant, and the constant may take a value from a preset value set.

When the difference between the first user equipment identifier and the second user equipment identifier is a constant, the constant is multiplied by one of the user equipment identifiers (the first user equipment identifier or the second user equipment identifier) to obtain a product, and the product corresponds to a preset fixed value The remainder obtained by taking the modulus is equal to another user equipment identifier (the second user equipment identifier or the first user equipment identifier), that is, at this time, the first user equipment identifier and the second user equipment identifier satisfy a preset corresponding relationship. The provided preset user device identifier correspondence can be shown in the following formula:

(C _i,j *n _RNTIi )mod D=n _RNTIj

Wherein, i, j represent the carrier number, and the constant C _{i, j} can take a value from a preset value set, and a value set provided by the embodiment of the present invention is {1, 2, ..., 65536}; the network The user equipment identifiers on any two carriers allocated for any user equipment all satisfy the above relationship, that is, C _{i, j} is the same for all user equipments and is a constant; the value of C _{i, j} varies with different carriers The values are different, that is, C _{i, j} varies with the values of i and j.

The set {1, 2, ..., 65536} where C _{i and j} take values is equivalent to the set consisting of elements (A ⁿ mod D), where the value range of n is {1, 2, ..., 65536 }, that is, the set of C _{i, j} values is equivalent to {A ¹ mod D, A ² mod D, ..., A ⁶⁵⁵³⁶ mod D}, where A is a fixed value, and the value of A can be 39827, D To preset a fixed value, the value of D can be 65537; since Y _-1 =n _RNT1 and Y _k =(A*Y _k-1 )modD, generally a wireless frame includes 10 time transmission units, so for To make a user equipment in a radio frame, the iteration values of each time transmission unit on each of the above-mentioned carriers are different, to reduce the conflict of the user equipment control channel to a greater extent, the constant C _{i, j} needs to be from n to at least greater than or equal to 10 Select from the elements of (A ⁿ modD).

Assuming that the user equipment identity of the user equipment on the 0th carrier is n _RNTI0 , the user equipment identity on the 1st carrier is n _RNTI1 , and the user equipment identity on the 2nd carrier is n _RNTI2 , then according to the above preset Assume that the relationship between n _RNTI0 , n _RNTI1 , n _RNTI2 , ... can be expressed as follows:

n _RNTI1 = (C _0,1 *n _RNTI0 ) mod D

＝[(A ^m mod D)*n _RNTI0 ] mod D

＝(A ^m *n _RNTI0 ) mod D

n _RNTI2 = (C _{0, 2} *n _RNTI0 ) mod D

＝[(A ⁿ mod D)*n _RNTI0 ] mod D

＝(A ⁿ *n _RNTI0 ) mod D

If m<n,

n _RNTI2 = (C _1,2 *n _RNTI1 ) mod D

＝{[(A ^|mn| )mod D]*n _RNTI1 }mod D

＝(A ^|mn| *n _RNTI1 ) mod D

Among them, |x.| represents the absolute value of x;

If m>n,

n _RNTI1 = (C ₁₂ *n _RNTI2 ) mod D

＝{[(A ^|nm| )mod D]*n _RNTI2 }mod D

＝(A ^|mn| *n _RNTI2 ) mod D

According to the preset relationship defined above, it is required that m, n, |m-n|, ..., etc. must be at least greater than or equal to 10.

The following description will be made by taking the difference between the user equipment identities of the user equipment on each carrier at least A ¹⁰ mod D, C _i,j =(A ¹⁰ ) ^|ij| mod D as an example.

Assuming that the user equipment identity of the user equipment on the 0th carrier is n _RNTI0 , the user equipment identity on the 1st carrier is n _RNTI1 , and the user equipment identity on the 2nd carrier is n _RNTI2 , then according to the above preset Assume that the relationship between n _RNTI0 , n _RNTI1 , n _RNTI2 , ... can be expressed as follows:

n _RNTI1 = (C _0,1 *n _RNTI0 ) mod D

＝[(A ¹⁰ mod D)*n _RNTI0 ]mod D

=(A ¹⁰ *n _RNTI0 ) mod D

n _RNTI2 = (C _{0, 2} *n _RNTI0 ) mod D

＝[(A ²⁰ mod D)*n _RNTI0 ] mod D

＝(A ²⁰ *n _RNTI0 ) mod D

n _RNTI2 = (C _1,2 *n _RNTI1 ) mod D

＝{[(A ^|20-10| )mod D]*n _RNTI1 }mod D

=(A ¹⁰ *n _RNTI1 ) mod D

The difference between the user equipment identity n _RNTI0 on the 0th carrier and the user equipment identity n _RNTI1 on the first carrier is a constant C _0,1 = A ¹⁰ mod D; the user equipment on the first carrier The difference between the user equipment identity n _RNTI1 and the user equipment identity n _RNTI2 on the second carrier is a constant C _{1, 2} = A ¹⁰ mod D; the user equipment identity n _RNTI0 on the 0th carrier is different from that on the second The difference between the user equipment identities n _RNTI2 on the carriers is a constant C _0,2 = A ²⁰ mod D; . . . the difference between the user equipment identities on any two carriers is at least A ¹⁰ mod D.

The change law of the iteration value of the transmission unit on the same carrier at different times satisfies the existing design of the LTE system, and the subsequent Y _k is obtained from the previous Y _k-1 , . . . , Y _-1 iterations. Therefore, satisfying the constant C _{i, j} is selected from elements of (A ⁿ mod D) where n is at least greater than or equal to 10, and the iteration value in any time transmission unit of any carrier of the user equipment is different.

If the different user equipment identifiers of a user determined by the network side satisfy the above preset relationship, the network side may send at least one user equipment identifier to the user;

(2) The network side and the user equipment may determine the initial iteration value of the user equipment on the corresponding carrier according to the user equipment identifier of the user equipment on the corresponding carrier.

Specifically, the user equipment identifier may be directly used as the initial iteration value of the user equipment on the carrier, for example, the first iteration initial value may be the first user equipment identifier (UEID) allocated for the user equipment on the first carrier, Correspondingly, the second iteration initial value may also be the second user equipment identifier allocated for the user equipment on the second carrier. Of course, this embodiment of the present invention does not limit that the initial iteration value assigned to the user equipment must be equal to the user equipment identifier of the user equipment, and the initial iteration value assigned to the user equipment may also have a certain relationship with the user equipment identifier.

(3) If the transmission unit is scheduled to a user equipment at the current time, the network side determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the user equipment according to the second iteration initial value The starting position of the search space of the control channel on the second carrier.

If the current time transmission unit is the receiving time unit of a certain user equipment, the user equipment starts to detect from the starting position of the search space of the control channel on the first carrier determined by the initial value of the first iteration, and the initial value of the second iteration is determined by the initial value of the second iteration The starting position of the search space of the control channel on the second carrier starts to be detected.

After determining the initial value of the first iteration and the initial value of the second iteration, the following formula can be used to determine:

Y _k = (A*Y _k-1 ) mod D;

其中，A的取值可以为39827；D的取值可以为65537；迭代值Y_k可以看作是随时间传输单元号k变化的迭代值，其中Y_-1是迭代初值，迭代初值不为0；L是聚合水平(aggregation level)，N_CCE，k是第k个时间传输单元中系统用于控制信道传输的CCE的总数量；当前时间传输单元的迭代值Y_k是通过前一个时间传输单元的迭代值Y_k-1乘以常数A后对D取模得到的；所以当前时间传输单元的迭代值Y_k是前边K-1个时间传输单元的迭代值进行迭代运算得出的结果；其中mod运算，代表取模，A mod B代表求A/B的余数；Z_k(L)代表在第k个时间传输单元中控制信道的搜索空间的起点位置。由于搜索空间的大小是可以预知的，因此在确定了控制信道的搜索空间的起点位置后，可以从控制信道的搜索空间的起点位置开始的搜索空间中选择任意一个控制信道，从而确定控制信道的具体位置。

Among them, the value of A can be 39827; the value of D can be 65537; the iteration value Y _k can be regarded as the iteration value that changes with the time transmission unit number k, where Y _-1 is the initial value of the iteration, and the initial value of the iteration is not is 0; L is the aggregation level (aggregation level), N _{CCE, k} is the total number of CCEs used by the system for control channel transmission in the kth time transmission unit; the iteration value Y _k of the current time transmission unit is the The iterative value Y _k-1 of the transmission unit is multiplied by the constant A and then obtained by taking the modulus of D; so the iterative value Y _k of the current time transmission unit is the result of iterative operation on the iterative value of the previous K-1 time transmission units ; wherein mod operation represents modulus, A mod B represents the remainder of A/B; Z _k (L) represents the starting position of the search space of the control channel in the kth time transmission unit. Since the size of the search space is predictable, after determining the starting position of the search space of the control channel, any control channel can be selected from the search space starting from the starting position of the search space of the control channel, so as to determine the starting point of the control channel specific location.

It can be seen from the above that, in this embodiment, the first user equipment identity assigned by the user equipment on the first carrier is different from the second user equipment identity assigned on the second carrier, so even if the user equipment is different from one or more other users The control channel of the device on the first carrier collides, and since the second user equipment identity of the user equipment on the second carrier is different from the first user equipment identity, the search space of the control channel of the user equipment on the second carrier The starting position of the user equipment will be different from the starting position of the search space of the control channel of the user equipment on the first carrier, thereby avoiding the conflict with the control channel of the other one or more user equipment on the second carrier, thus The user equipment and the one or more other user equipments can be scheduled on the second carrier at the same time, which ensures the high data rate of the user equipment and the one or more other user equipments, so two or more user equipments can When the control channels of the two or more user equipments collide on the first carrier, the control channels of the above two or more user equipments do not collide on the second carrier.

In the method for reducing control channel conflicts provided in the embodiments of the present invention, if the number of system carriers or the number of carriers that users can support data transmission or the number of carriers that can be used to transmit control channels is at least three, it can be used for the user equipment in the above The user equipment identities allocated on the at least three carriers are different from each other; the user equipment identities allocated to the user equipment on the above-mentioned at least three carriers are different from each other, and the control channels of two or more user equipments may be on one carrier When a collision occurs on the above-mentioned two or more user equipments, the control channels of the above-mentioned two or more user equipments do not collide on other carriers, so that the high data rate of the above-mentioned two or more user equipments can be further ensured.

In this solution, although each user equipment is assigned a different user equipment identity on each carrier, for each carrier, the user equipment only occupies one user equipment identity, which will not cause waste of user equipment identity.

Second option:

(1) The network side allocates a user equipment identifier to the user equipment.

(2) The network side and the user equipment determine different initial iteration values of the user equipment on at least two carriers according to a certain preset relationship between the user equipment identifier and the initial iteration values.

Wherein, at least two carriers include a first carrier and a second carrier, and different initial values of iteration include a first initial value of iteration and a second initial value of iteration, the first carrier corresponds to the first initial value of iteration, the second carrier corresponds to the second The initial value of the iteration corresponds to;

Specifically, the initial iteration value on a certain carrier is determined by the user equipment identity of the user equipment, and the user equipment identity can be directly used as the initial iteration value of the user equipment on a certain carrier, for example, the user equipment identity of the user equipment It is equal to the initial value of the first iteration on the first carrier; and the initial value of the second iteration on the second carrier of the user equipment has a certain preset relationship with the initial value of the first iteration. According to this preset relationship, it can be determined that the user equipment is in The initial value of the second iteration on the second carrier. Of course, this embodiment of the present invention does not limit that the initial iteration value assigned to the user equipment must be equal to the user equipment identifier of the user equipment, and the initial iteration value assigned to the user equipment may also have a certain relationship with the user equipment identifier.

The preset relationship between the iteration initial values in the embodiment of the present invention may be, for example: the difference between the first iteration initial value and the second iteration initial value may be a constant, and the constant may be selected from a preset value set .

When there is a constant difference between the initial value of the first iteration and the initial value of the second iteration, the constant is multiplied by one of the initial values of the iteration (the initial value of the first iteration or the initial value of the second iteration) to obtain a product, and the product is opposite to the preset fixed value The remainder obtained by taking the modulus is equal to another initial iteration value (the initial value of the second iteration or the initial value of the first iteration), that is, the initial value of the first iteration and the initial value of the second iteration satisfy the preset corresponding relationship at this time, the embodiment of the present invention The provided preset iterative initial value correspondence can be shown in the following formula:

(C _{i, j} *Y _{i, -1} ) mod D = Y _{j, -1}

Where i, j represent the carrier number, and the constant C _{i, j} can take a value from a preset value set, and a value set provided by the embodiment of the present invention is {1, 2, ..., 65536}; any one The initial value of iteration on any two carriers of the user equipment satisfies the above relationship, that is, C _{i, j} is the same for all user equipment, and is a constant; the value of C _{i, j} varies with different carriers, that is, C _{i, j} vary with the values of i and j.

The iteration processing on each carrier satisfies the preset relationship described in Solution 1.

(3) If the transmission unit is scheduled to a user equipment at the current time, the network side determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the user equipment according to the second iteration initial value The starting position of the search space of the control channel on the second carrier. Since the size of the search space is predictable, after determining the starting position of the search space of the control channel, any control channel can be selected from the search space starting from the starting position of the search space of the control channel, so as to determine the starting point of the control channel specific location.

After determining the initial value of the first iteration and the initial value of the second iteration, the following formula can be used to determine:

Y _k = (A*Y _k-1 ) mod D;

其中，A的取值可以为39827；D的取值可以为65537；迭代值Y_k可以看作是随时间传输单元号k变化的迭代值，其中Y_-1是迭代初值，迭代初值不为0；L是聚合水平(aggregation level)，N_CCE，k是第k个时间传输单元中系统用于控制信道传输的CCE的总数量；当前时间传输单元的迭代值Y_k是通过前一个时间传输单元的迭代值Y_k-1乘以常数A后对D取模得到的；所以当前时间传输单元的迭代值Y_k是前边K-1个时间传输单元的迭代值进行迭代运算得出的结果；其中mod运算，代表取模，A mod B代表求A/B的余数；Z_k(L)代表在第k个时间传输单元中控制信道的搜索空间的起点位置。

Among them, the value of A can be 39827; the value of D can be 65537; the iteration value Y _k can be regarded as the iteration value that changes with the time transmission unit number k, where Y _-1 is the initial value of the iteration, and the initial value of the iteration is not is 0; L is the aggregation level (aggregation level), N _{CCE, k} is the total number of CCEs used by the system for control channel transmission in the kth time transmission unit; the iteration value Y _k of the current time transmission unit is the The iterative value Y _k-1 of the transmission unit is multiplied by the constant A and then obtained by taking the modulus of D; so the iterative value Y _k of the current time transmission unit is the result of iterative operation on the iterative value of the previous K-1 time transmission units ; wherein mod operation represents modulus, A mod B represents the remainder of A/B; Z _k (L) represents the starting position of the search space of the control channel in the kth time transmission unit.

It can be seen from the above that in this embodiment, the initial value of the first iteration of the user equipment on the first carrier is different from the initial value of the second iteration on the second carrier, so even if the user equipment is in the The control channel on the first carrier conflicts, because the initial value of the second iteration of the user equipment on the second carrier is different from the initial value of the first iteration, the starting point of the search space of the control channel of the user equipment on the second carrier The position will be different from the starting position of the search space of the control channel of the user equipment on the first carrier, so as to avoid conflicts with the control channels of the other one or more user equipment on the second carrier, and thus can be in Simultaneous scheduling of the user equipment and the one or more other user equipments on the second carrier ensures the high data rate of the user equipment and the one or more other user equipments, so it can be controlled by two or more user equipments When channels collide on the first carrier, the control channels of the above two or more user equipments do not collide on the second carrier.

In the method for reducing control channel conflicts provided in the embodiments of the present invention, if the number of system carriers or the number of carriers that users can support data transmission or the number of carriers that can be used to transmit control channels is at least three, it can be used for the user equipment in the above The iteration initial values on at least three carriers are different from each other; because the iteration initial values of the user equipment on the above-mentioned at least three carriers are different from each other, it can occur on one carrier when the control channels of two or more user equipment When conflicting, the control channels of the two or more user equipments do not collide on other carriers, so that the high data rate of the two or more user equipments can be further ensured.

The second scheme is compared with the first scheme: because the user equipment identification has many purposes, for example, the user equipment identification is a parameter initialized by the scrambling code generator for uplink and downlink data scrambling; the control channel of each user equipment adds The user equipment identification of the corresponding user equipment should also be masked on the cyclic redundancy check code so that the user equipment can detect its own control channel accordingly. Therefore, the allocation of user equipment identification among users is mutually exclusive. When a user equipment is in Once a user equipment identity is allocated to a carrier, other user equipment must not be allocated the same user equipment identity.

When a user equipment is assigned a user equipment identity, and the user equipment uses the same user equipment identity on each carrier, this user equipment identity cannot be assigned to other users on any carrier; according to the second scheme, although a user equipment The device only occupies one user equipment identity, but this user equipment identity must be used on all carriers. In order to ensure compatibility: Y _-1 = n _RNTI , so the user equipment identity corresponding to the user equipment identity on any carrier That initial iteration value cannot be used by other user equipment, and this user equipment has unequal initial iteration values on all carriers. Similarly, in order to ensure compatibility, since Y _-1 = n _RNTI , on any carrier The user equipment identifier corresponding to the initial value of the iteration cannot be used by other users, otherwise a control channel conflict will be caused. Therefore, the user equipment identities equal to the initial values of the iterations of the user equipment on each carrier are equivalent to being allocated to the user. Since a user needs to occupy user equipment identities proportional to the number of carriers, the second solution needs to occupy The user equipment identifier needs to occupy more user equipment identifiers than the first solution.

Figure 1 describes the process of Embodiment 1 of the method for reducing control channel conflicts provided by the embodiment of the present invention, including:

101. The starting point determining means determines at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier; wherein the user equipment corresponds to the user equipment identifier, and the at least two carriers include a first carrier and a second carrier, At least two iteration initial values include a first iteration initial value and a second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial value, the first iteration initial value corresponds to the second iteration The initial value is different;

The device for determining the starting point in the embodiment of the present invention may be a network-side device or a user device; specifically, the network-side device may be a base station; the user device identifier is allocated by the network side for the user device, so the network-side device and All user equipments can obtain the user equipment identifier assigned to the user equipment.

The user equipment identifier assigned by the network side to the user equipment may be the same on each carrier, and at this time, the starting point position determining means determines at least two iteration initial values of the user equipment on at least two carriers according to one user equipment identifier; specifically, the starting point After obtaining the same user equipment identification of the user equipment on at least two carriers, the location determination device determines at least two iteration initial values according to the correspondence between the user equipment identification and the iteration initial value; wherein, the user equipment identification and the iteration initial value The corresponding relationship can be set in advance. The embodiment of the present invention does not need to limit the specific corresponding relationship between the user equipment identifier and the initial iteration value, as long as the set corresponding relationship between the user equipment identifier and the initial iteration value can make the first iteration initial value and the second iteration initial value Different initial values of iterations will not affect the realization of the embodiment of the present invention.

The user equipment identification assigned by the network side to the user equipment may also be different on each carrier. At this time, the starting point determination device determines the initial iteration value of the user equipment on the corresponding carrier according to the user equipment identification on each carrier; specifically, After obtaining at least two user equipment identities of the user equipment on at least two carriers, the starting point determining means uses the user equipment identities corresponding to the carriers to determine at least two iteration initial values of the user equipment on the carriers, wherein the user equipment There is a one-to-one correspondence between the identifier and the carrier. At this time, the user equipment identifier can be directly used as the initial iteration value of the user equipment on the carrier, for example, the first iteration initial value can be the first user equipment identifier (UEID) allocated for the user equipment on the first carrier, correspondingly , the second iteration initial value may also be the second user equipment identifier allocated for the user equipment on the second carrier; of course, the embodiment of the present invention does not limit the iteration initial value allocated for the user equipment to be allocated for the user equipment The user equipment identifier, the iteration initial value allocated to the user equipment may also be other identifiers different from the user equipment identifier.

Wherein, in the embodiment of the present invention, the difference between the initial value of the first iteration and the initial value of the second iteration may be that there is no relationship between the initial value of the first iteration and the initial value of the second iteration, or that the initial value of the first iteration may be different from the initial value of the second iteration. Satisfy the preset relationship between the initial values; for example, in the embodiment of the present invention, the initial value of the first iteration and the initial value of the second iteration can differ by a constant, and the constant can take a value from a preset value set; the implementation of the present invention For example, when there is a constant difference between the initial value of the first iteration and the initial value of the second iteration, the remainder obtained by moduloing the preset fixed value of the product of the constant and the initial value of the first iteration is equal to the initial value of the second iteration, that is, the first The initial value of the iteration and the initial value of the second iteration satisfy the preset corresponding relationship of the iterative initial value, and the corresponding relationship of the preset iterative initial value provided by the embodiment of the present invention can be shown in the following formula:

(C _{i, j} *Y _{i, -1} ) mod D = Y _{j, -1}

Wherein the constant C _{i, j} can take a value from a preset value set, i, j is the carrier number, and a value set provided by the embodiment of the present invention is {1, 2, ..., 65536};

When the number of at least two carriers in the embodiment of the present invention is three or more, the first carrier and the second carrier are any two of the three or more carriers; When there are two, the first carrier may be any one of the two carriers.

102. The starting position determining means determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the search space of the control channel of the user equipment on the second carrier according to the second iteration initial value starting position of .

After determining the initial value of the first iteration and the initial value of the second iteration, the following formula can be used to determine:

其中，Y_k＝(A*Y_k-1)mod D；

Among them, Y _k = (A*Y _k-1 ) mod D;

Among them, the value of A can be 39827; the value of D can be 65537; the iteration value Y _k can be regarded as the iteration value that changes with the time transmission unit number k, where Y _-1 is the initial value of the iteration. The initial value is the UEID or C-RNTI assigned by the system to the user equipment, which is equal to n _RNTI , and the initial value of the iteration is not 0; L is the aggregation level (aggregation level), N _{cce, k} is the k-th time transmission unit used by the system is based on the total number of CCEs transmitted by the control channel; the iteration value Y _k of the current time transmission unit is obtained by multiplying the iteration value Y _k-1 of the previous time transmission unit by a constant A and taking the modulus of D; so the current time transmission unit The iterative value Y _k of the previous K-1 time transmission units is the result of the iterative operation of the iterative value of the previous K-1 time transmission units; the mod operation represents the modulus, and A mod B represents the remainder of A/B; Z _k (L) represents The starting position of the search space of the control channel in the k-th time transmission unit.

It can be seen from the above that in this embodiment, the initial value of the first iteration assigned to the user equipment on the first carrier is different from the initial value of the second iteration assigned on the second carrier, so even if the user equipment is connected with one or more other users The control channel of the device on the first carrier collides, and since the initial value of the second iteration of the user equipment on the second carrier is different from the initial value of the first iteration, the search space of the control channel of the user equipment on the second carrier The starting position of the user equipment will be different from the starting position of the search space of the control channel of the user equipment on the first carrier, so as to avoid conflicts with the control channel of one or more other user equipment on the second carrier, and thus can be in Simultaneous scheduling of the user equipment and the one or more other user equipments on the second carrier ensures the high data rate of the user equipment and the one or more other user equipments, so it can be controlled by two or more user equipments When channels collide on the first carrier, the control channels of the above two or more user equipments do not collide on the second carrier.

In the method for reducing control channel conflicts provided in the embodiments of the present invention, if the number of carriers is at least three, the initial iteration values allocated to the user equipment on the at least three carriers are different from each other; The iterative initial values allocated on the three carriers are different from each other, for example, there is a constant difference between any two of the at least three iterative initial values allocated on the at least three carriers, which can be used in two or more user equipments When the control channels of the above-mentioned two or more user equipments collide on one carrier, the control channels of the above two or more user equipments do not collide on other carriers, so that the high data rate of the above-mentioned two or more user equipments can be further ensured. rate.

FIG. 2 describes the flow of Embodiment 2 of the method for reducing control channel conflicts provided by the embodiment of the present invention, and describes the processing when the device for determining the origin position is a network-side device, including:

201. The network side device determines at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier; where the user equipment corresponds to the user equipment identifier, the at least two carriers include the first carrier and the second carrier, and at least The two iteration initial values include the first iteration initial value and the second iteration initial value. The first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial value, and the first iteration initial value corresponds to the second iteration initial value. different values;

The user equipment identifier assigned by the network side to the user equipment may be the same on each carrier, and at this time, the network side device determines at least two iteration initial values of the user equipment on at least two carriers according to one user equipment identifier; specifically, the network side After acquiring the same user equipment identity of the user equipment on at least two carriers, the device determines at least two iteration initial values according to the correspondence between the user equipment identity and the iteration initial value; wherein, the correspondence between the user equipment identity and the iteration initial value The relationship can be set in advance. The embodiment of the present invention does not need to limit the specific correspondence between the user equipment identifier and the initial iteration value, as long as the corresponding relationship between the user equipment identifier and the initial iteration value is set so that the initial initial value of the first iteration can be compared with the initial initial value of the second iteration. Different values will not affect the implementation of the embodiment of the present invention.

The user equipment identification assigned by the network side to the user equipment may also be different on each carrier. At this time, the network side device determines the initial iteration value of the user equipment on the corresponding carrier according to the user equipment identification on each carrier; specifically, the network After acquiring at least two user equipment identities of the user equipment on at least two carriers, the side equipment uses the user equipment identities corresponding to the carriers to determine at least two iteration initial values of the user equipment on the carriers, wherein the user equipment identities and There is a one-to-one correspondence between carriers. At this time, the user equipment identifier can be directly used as the initial iteration value of the user equipment on the carrier, for example, the first iteration initial value can be the first user equipment identifier (UEID) allocated for the user equipment on the first carrier, correspondingly , the second iteration initial value may also be the second user equipment identifier allocated for the user equipment on the second carrier; of course, the embodiment of the present invention does not limit the iteration initial value allocated for the user equipment to be allocated for the user equipment The user equipment identifier, the iteration initial value allocated to the user equipment may also be other identifiers different from the user equipment identifier.

Wherein, in the embodiment of the present invention, the difference between the initial value of the first iteration and the initial value of the second iteration may be that there is no relationship between the initial value of the first iteration and the initial value of the second iteration, or that the initial value of the first iteration may be different from the initial value of the second iteration. Satisfy the preset relationship between the initial values; for example, in the embodiment of the present invention, the initial value of the first iteration and the initial value of the second iteration can differ by a constant, and the constant can take a value from a preset value set; the implementation of the present invention For example, when there is a constant difference between the initial value of the first iteration and the initial value of the second iteration, the remainder obtained by moduloing the preset fixed value of the product of the constant and the initial value of the first iteration is equal to the initial value of the second iteration, that is, the first The initial value of the iteration and the initial value of the second iteration satisfy the preset corresponding relationship of the iterative initial value, and the corresponding relationship of the preset iterative initial value provided by the embodiment of the present invention can be shown in the following formula:

(C _{i, j} *Y _{i, -1} ) mod D = Y _{j, -1}

Wherein the constant C _{i, j} can take a value from a preset value set, and a value set provided by the embodiment of the present invention is {1, 2, ..., 65536};

202. The network side device determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the position of the search space of the control channel of the user equipment on the second carrier according to the second iteration initial value starting position;

Among them, 202 is only executed when the transmission unit of the carrier is scheduled to the user equipment at the current time; since the size of the search space is predictable, after the starting position of the search space of the control channel is determined, the search space of the control channel can be Select any control channel in the search space starting from the starting position of , so as to determine the specific position of the control channel;

202 can refer to 102 for details;

203. The network side device transmits the control channel of the user equipment on the first carrier in the search space of the control channel on the first carrier, and transmits the control channel of the user equipment on the second carrier in the search space of the control channel on the second carrier .

Specifically, the control channel is transmitted at the specific position of the control channel determined in 202 .

It can be seen from the above that since the initial value of the first iteration assigned to the user equipment on the first carrier in this embodiment is different from the initial value of the second iteration assigned on the second carrier, the network side equipment can The control channel is transmitted on the first carrier, and the control channel is transmitted on the second carrier according to the second iteration initial value, so even if the user equipment collides with the control channel of one or more other user equipment on the first carrier, due to the The initial value of the second iteration of the user equipment on the second carrier is different from the initial value of the first iteration, so that the starting position of the search space of the control channel of the user equipment on the second carrier will be different from that of the user equipment on the first carrier. The starting position of the search space of the control channel is different, so that the position of the control channel transmitted by the network side on the second carrier for the user equipment is different from the position of the control channel transmitted by the network side on the second carrier for one or more user equipments. The positions are different, so as to avoid conflicts with the control channel of one or more other user equipments on the second carrier, so that the user equipment and the above-mentioned one or more other user equipments can be scheduled on the second carrier at the same time, ensuring The high data rate of the user equipment and the one or more other user equipments, so when the control channels of the two or more user equipments collide on the first carrier, the control channels of the two or more user equipments may No collision occurs on the second carrier.

Fig. 3 describes the process of Embodiment 3 of the method for reducing control channel conflicts provided by the embodiment of the present invention, and describes the processing when the device for determining the origin position is a user equipment, including:

301. The user equipment determines at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier; where the user equipment corresponds to the user equipment identifier, the at least two carriers include a first carrier and a second carrier, and at least two The first iteration initial value includes the first iteration initial value and the second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial value, the first iteration initial value and the second iteration initial value different;

The user equipment identifier assigned by the network side to the user equipment may be the same on each carrier, and at this time, the user equipment determines at least two iteration initial values of the user equipment on at least two carriers according to one user equipment identifier; specifically, the user equipment is in After obtaining the same user equipment identity of the user equipment on at least two carriers, determine at least two iteration initial values according to the correspondence between the user equipment identity and the iteration initial value; wherein, the correspondence between the user equipment identity and the iteration initial value can be Preset, the embodiment of the present invention does not need to limit the specific correspondence between the user equipment identifier and the initial iteration value, as long as the corresponding relationship between the user equipment identifier and the initial iteration value is set so that the initial initial value of the first iteration is different from the initial initial value of the second iteration Neither will affect the implementation of the embodiment of the present invention.

The user equipment identification assigned by the network side to the user equipment may also be different on each carrier. At this time, the user equipment determines the initial iteration value of the user equipment on the corresponding carrier according to the user equipment identification on each carrier; specifically, the user equipment After acquiring at least two user equipment identities of the user equipment on at least two carriers, determine at least two iteration initial values of the user equipment on the carrier using the user equipment identities corresponding to the carriers, wherein the user equipment identities are equal to the carrier One to one correspondence. At this time, the user equipment identifier can be directly used as the initial iteration value of the user equipment on the carrier, for example, the first iteration initial value can be the first user equipment identifier (UEID) allocated for the user equipment on the first carrier, correspondingly , the second iteration initial value may also be the second user equipment identifier allocated for the user equipment on the second carrier; of course, the embodiment of the present invention does not limit the iteration initial value allocated for the user equipment to be allocated for the user equipment The user equipment identifier, the iteration initial value allocated to the user equipment may also be other identifiers different from the user equipment identifier.

Wherein, in the embodiment of the present invention, the difference between the initial value of the first iteration and the initial value of the second iteration may be that there is no relationship between the initial value of the first iteration and the initial value of the second iteration, or that the initial value of the first iteration may be different from the initial value of the second iteration. Satisfy the preset relationship between the initial values; for example, in the embodiment of the present invention, the initial value of the first iteration and the initial value of the second iteration can differ by a constant, and the constant can take a value from a preset value set; the implementation of the present invention For example, when there is a constant difference between the initial value of the first iteration and the initial value of the second iteration, the remainder obtained by moduloing the preset fixed value of the product of the constant and the initial value of the first iteration is equal to the initial value of the second iteration, that is, the first The initial value of the iteration and the initial value of the second iteration satisfy the preset corresponding relationship of the iterative initial value, and the corresponding relationship of the preset iterative initial value provided by the embodiment of the present invention can be shown in the following formula:

(C _{i, j} *Y _{i, -1} ) mod D = Y _{j, -1}

Wherein the constant C _{i, j} can take a value from a preset value set, and a value set provided by the embodiment of the present invention is {1, 2, ..., 65536};

302. The user equipment determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the starting point of the search space of the control channel of the user equipment on the second carrier according to the second iteration initial value Location;

302 can be implemented with reference to 102;

303. The user equipment detects the control channel of the user equipment on the first carrier in the search space of the control channel on the first carrier according to the starting position of the search space of the control channel of the user equipment on the first carrier; At the start position of the search space of the control channel on the second carrier, the search space of the control channel on the second carrier detects the control channel of the user equipment on the second carrier.

It can be seen from the above that although the initial value of the first iteration of the user equipment on the first carrier in this embodiment is different from the initial value of the second iteration on the second carrier, the user equipment can The control channel is detected on the second carrier, and the detection channel is detected on the second carrier according to the second iteration initial value, so that even if the first iteration initial value of the user equipment on the first carrier is different from the second iteration initial value on the second carrier, it does not It will affect the detection of the control channel by the user equipment; therefore, when the network side transmits the control channel, even if the transmitted user equipment collides with the control channel of one or more other user equipment on the first carrier, because the user equipment is in The second iteration initial value allocated on the second carrier is different from the first iteration initial value, so that the control channel transmitted by the network side on the second carrier is different from the control channel transmitted by other one or more user equipments on the second carrier, Thereby avoiding the control channel conflict with other one or more user equipments on the second carrier, so the user equipment and the above-mentioned one or more other user equipments can be scheduled on the second carrier at the same time, ensuring that the user equipment and the high data rate of the one or more other user equipments, so when the control channels of two or more user equipments collide on the first carrier, the control channels of the two or more user equipments on the second No collisions occur on the carrier.

The following specific examples are given to describe the embodiment of the method for reducing control channel conflicts provided by the embodiments of the present invention. Embodiment 4 of the method for reducing control channel conflicts provided by the embodiments of the present invention is as follows:

The initial iteration values of the user equipment on different carriers are different; the initial iteration values of the user equipment on different carriers have the following relationship:

(1) There is a constant difference between the initial values of iterations on any two carriers. Assuming that any two carriers are the first carrier and the second carrier, the initial value of the first iteration on the first carrier and the second iteration on the second carrier The initial value satisfies the following relationship: the product of the constant and the initial value of the first iteration is modulo the preset fixed value, and the remainder is equal to the initial value of the second iteration. The preset fixed value is preset, for example, it can be set to 65537, etc.;

Assume that the first carrier is the i-th carrier scheduled to the user equipment, and the initial value of iteration on the i-th carrier is represented by Y _{i, -1} ; the second carrier is the j-th carrier scheduled to the user equipment, and the j-th carrier The initial value of the iteration above is represented by Y _{j, -1} , the constant difference between the initial value of the first iteration and the initial value of the second iteration is C _{i, j} , and the preset fixed value is D, then Y _{i, -1} and Y _j, The relationship of _-1 can be expressed by the following formula:

(C _{i, j} *Y _{i, -1} ) mod D = Y _{j, -1}

(2) The iterative initial value of the network side on any two carriers allocated to any user equipment can satisfy the relationship described in (1), that is, C _{i, j} is the same for all user equipment and is a constant , the value of C _{i, j} varies with different carriers, that is, C _{i, j} varies with the values of i and j, and the value range of C _{i, j} can be set {1, 2,... , 65536}.

The set {1, 2, ..., 65536} of C _{i and j} values is equivalent to the set composed of elements (A^n mod D), where A^n represents the nth power of A, and the value of n is The value set is {1, 2, ..., N}, N is the number of user equipment identifiers, or satisfies a fixed relationship with the number of user equipment identifiers; that is, the set of C _i,j values is equivalent to {A^1mod D, A^2mod D,..., A^65536mod D}; Generally, a radio frame includes 10 time transmission units, so in order to make the iteration initial value of each time transmission unit of each carrier in a radio frame different from each other Similarly, the constant C can be selected from (A^n mod D) elements where n is greater than or equal to M, where the value of A can be 39827, and the value of D can be 65537, where M is the time within a time transmission cycle The number of transmission units, where the time transmission period may be a radio frame, and the time transmission unit may be a subframe of the radio frame.

Suppose the constant C ₀₁ of the difference between Y _{0, -1} and Y _{1, -1} is A^I mod D; the constant C ₀₂ of the difference between Y _{0, -1} and Y _{2, -1} is A^II mod D; Y _1, The constant C ₁₂ that differs between _-1 and Y _{2, -1} is (A^II/A^I) mod D = A^(II-I) mod D. At this time, the iteration values Y _0,0 to Y _0,9 of the user equipment on the 0th carrier can be expressed as follows:

Y _{0, 0} = (A*Y _{0, -1} ) mod D

Y _{0, 1} = (A*Y _{0, 0} ) mod D = (A^2*Y _{0, -1} ) mod D

Y _{0, 9} = (A*Y _{0, 8} ) mod D = (A^10*Y _{0, -1} ) mod D

Correspondingly, the iteration values Y _1,0 to Y _1,9 of the user equipment on the first carrier can be expressed as follows:

Y _{1, 0} = (A*Y _{1, -1} ) mod D = {A*[(A^I mod D)*Y _{0, -1} ]} mod D, where I is from the set {1, 2, . ..., 65536} is greater than or equal to 10;

Y _1,1 = (A*Y _1,0 ) mod D

Y _1,9 = (A*Y _1,8 ) mod D

Correspondingly, the iteration values Y _2,0 to Y _2,9 of the user equipment on the second carrier can be expressed as follows:

Y _{2, 0} = (A*Y _{2, -1} ) mod D = {A*[(A^II mod D)*Y _{0, -1} ]} mod D, where II is from the set {1, 2, . ..., 65536} is greater than or equal to 10;

Y _2,1 = (A*Y _2,0 ) mod D

Y2, 9 = (A*Y2, 8) mod D

As follows, the difference between the initial iteration value of the user equipment on each carrier is at least A^10modD, C _{i, j} = (A^10)^(ji)modD as an example for illustration:

Assume that C ₀₁ between carrier 0 and carrier 1 and C ₁₂ between carrier 1 and carrier 2 are equal to A^10mod D, and n is 10 at this time; C ₀₂ between carrier 0 and carrier 2 = A^20mod D, and n is 20 at this time .

The initial values of the iterations on the 0th carrier, the 1st carrier and the 2nd carrier are respectively Y _{0, -1} , Y _{1, -1} = (A^10mod D)*Y _{0, -1} , Y _{2 ,-1} ＝(A^10mod D)*Y _1,-1 ＝(A^20mod D)*Y _0,-1 , Y _0,-1 and Y _1,-1 have a fixed relationship C _i,j is ( A^10mod D), Y _1,1 and Y _2,-1 have a fixed relationship C _i,j is (A^10mod D), Y _0,-1 and Y _2,-1 have a fixed relationship C _i,j is (A^20mod D); The change law of the starting position of the search space of the control channel of the different time transmission units on the same carrier satisfies the existing design of the LTE system, and the subsequent Y _k is Y _k-1 before,... , Y _-1 iterated from. Therefore, the starting positions of the search spaces of the control channels of the user equipment on different carriers in any time transmission unit are different. When the initial value of the iteration is the user equipment identity, the network side may assign a user equipment identity to the user equipment on each carrier.

Suppose the constant C ₀₁ of the difference between Y _{0, -1} and Y _{1, -1} is A^10mod D; the constant C ₀₂ of the difference between Y _{0, -1} and Y _{2, -1} is A^20mod D; Y _{1, -1} The constant C ₁₂ that differs from Y _{2, -1} is A^10 mod D. At this time, the iteration values Y _0,0 to Y _0,9 of the user equipment on the 0th carrier can be expressed as follows:

Y _{0, 0} = (A*Y _{0, -1} ) mod D

Y _0,1 = (A*Y _0,0 ) mod D

Y _0,9 = (A*Y _0,8 ) mod D

Correspondingly, the iteration values Y _1,0 to Y _1,9 of the user equipment on the first carrier can be expressed as follows:

Y _{1, 0} = (A*Y _{1, -1} ) mod D = [A*(A^10 mod D)*Y _{0, -1} )] mod D

Y _1,1 = (A*Y _1,0 ) mod D

Y _1,9 = (A*Y _1,8 ) mod D

Correspondingly, the iteration values Y _2,0 to Y _2,9 of the user equipment on the second carrier can be expressed as follows:

Y _{2, 0} = (A*Y _{2, -1} ) mod D = [A*(A^20 mod D)*Y _{0, -1} )] mod D

Y _2,1 = (A*Y _2,0 ) mod D

Y _2,9 = (A*Y _2,8 ) mod D

Figure 4 describes the structure of an embodiment of an apparatus for reducing control channel conflicts provided by an embodiment of the present invention, including:

An iteration initial value determining unit 401, configured to determine at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier, the user equipment corresponds to the user equipment identifier, and the at least two carriers include a first carrier and a second carrier , at least two iteration initial values include the first iteration initial value and the second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial value, the first iteration initial value corresponds to the second The initial value of iteration is different;

Specifically, the iteration initial value determination unit 401 may include an acquisition unit 4011 and a determination unit 4012, wherein:

The obtaining unit 4011 is configured to obtain at least two user equipment identities of the user equipment on at least two carriers, the user equipment identities correspond to the carriers one by one, the user equipment corresponds to the user equipment identities, and the at least two carriers include the first carrier and the second carrier. Two carriers;

The determining unit 4012 is configured to use the user equipment identifier corresponding to the carrier to determine at least two initial iteration values of the user equipment on the carrier, the at least two initial iteration values include a first initial iteration value and a second initial iteration value, the first carrier Corresponding to the initial value of the first iteration, the second carrier corresponds to the initial value of the second iteration, and the initial value of the first iteration is different from the initial value of the second iteration.

or

The obtaining unit 4011 is configured to obtain the same user equipment identity of the user equipment on at least two carriers, the user equipment corresponds to the user equipment identity, and the at least two carriers include a first carrier and a second carrier;

The determining unit 4012 is configured to determine at least two initial iteration values according to the correspondence between the user equipment identifier and the initial iteration value, the at least two initial iteration values include a first initial iteration value and a second initial iteration value, and the first carrier and the first The initial value of the iteration corresponds, the second carrier corresponds to the initial value of the second iteration, and the initial value of the first iteration is different from the initial value of the second iteration.

The start position determination unit 402 is configured to determine the start position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determine the start position of the control channel of the user equipment on the second carrier according to the second iteration initial value The starting position of the search space.

It can be seen from the above that in this embodiment, the initial value of the first iteration assigned to the user equipment on the first carrier is different from the initial value of the second iteration assigned on the second carrier, so even if the user equipment is connected with one or more other users The control channel of the device on the first carrier collides, and since the initial value of the second iteration of the user equipment on the second carrier is different from the initial value of the first iteration, the search space of the control channel of the user equipment on the second carrier The starting position of the user equipment will be different from the starting position of the search space of the control channel of the user equipment on the first carrier, so as to avoid conflicts with the control channel of one or more other user equipment on the second carrier, and thus can be in Simultaneous scheduling of the user equipment and the one or more other user equipments on the second carrier ensures the high data rate of the user equipment and the one or more other user equipments, so it can be controlled by two or more user equipments When channels collide on the first carrier, the control channels of the above two or more user equipments do not collide on the second carrier.

The apparatus for reducing control channel conflicts provided by the embodiments of the present invention can be used as a network side device, and can also be used as a user equipment.

Figure 5 describes the structure of the embodiment of the network side device provided by the embodiment of the present invention, including:

An iteration initial value determination unit 501, configured to determine at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier, the user equipment corresponds to the user equipment identifier, and the at least two carriers include a first carrier and a second carrier , at least two iteration initial values include the first iteration initial value and the second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial value, the first iteration initial value corresponds to the second The initial value of iteration is different;

The start position determining unit 502 is configured to determine the start position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determine the start position of the control channel of the user equipment on the second carrier according to the second iteration initial value The starting position of the search space;

The transmitting unit 503 is configured to transmit the control channel of the user equipment on the first carrier in the search space of the control channel on the first carrier, and transmit the control channel of the user equipment on the second carrier in the search space of the control channel on the second carrier channel.

It can be seen from the above that since the initial value of the first iteration assigned to the user equipment on the first carrier is different from the initial value of the second iteration assigned on the second carrier, the network side device in this embodiment can be based on the initial value of the first iteration in The control channel is transmitted on the first carrier, and the control channel is transmitted on the second carrier according to the second iteration initial value, so even if the user equipment collides with the control channel of one or more other user equipment on the first carrier, due to the The initial value of the second iteration of the user equipment on the second carrier is different from the initial value of the first iteration, so that the starting position of the search space of the control channel of the user equipment on the second carrier will be different from that of the user equipment on the first carrier. The starting position of the search space of the control channel is different, so that the position of the control channel transmitted by the network side on the second carrier for the user equipment is different from the position of the control channel transmitted by the network side on the second carrier for one or more user equipments. The positions are different, so as to avoid conflicts with the control channel of one or more other user equipments on the second carrier, so that the user equipment and the above-mentioned one or more other user equipments can be scheduled on the second carrier at the same time, ensuring The high data rate of the user equipment and the one or more other user equipments, so when the control channels of the two or more user equipments collide on the first carrier, the control channels of the two or more user equipments may No collision occurs on the second carrier.

Figure 6 describes the structure of the user equipment embodiment provided by the embodiment of the present invention, including:

An iteration initial value determination unit 601, configured to determine at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier, the user equipment corresponds to the user equipment identifier, and the at least two carriers include a first carrier and a second carrier , at least two iteration initial values include the first iteration initial value and the second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial value, the first iteration initial value corresponds to the second The initial value of iteration is different;

The starting position determining unit 602 is configured to determine the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determine the starting position of the control channel of the user equipment on the second carrier according to the second iteration initial value. The starting position of the search space;

The detection unit 603 is configured to detect the control channel of the user equipment on the first carrier in the search space of the control channel on the first carrier according to the starting position of the search space of the control channel of the user equipment on the first carrier; according to the user equipment At the start position of the search space of the control channel on the second carrier, the search space of the control channel on the second carrier detects the control channel of the user equipment on the second carrier.

It can be seen from the above that although the initial value of the first iteration of the user equipment on the first carrier in this embodiment is different from the initial value of the second iteration on the second carrier, the user equipment can The control channel is detected on the second carrier, and the detection channel is detected on the second carrier according to the second iteration initial value, so that even if the first iteration initial value of the user equipment on the first carrier is different from the second iteration initial value on the second carrier, it does not It will affect the detection of the control channel by the user equipment; therefore, when the network side transmits the control channel, even if the transmitted user equipment collides with the control channel of one or more other user equipment on the first carrier, because the user equipment is in The second iteration initial value allocated on the second carrier is different from the first iteration initial value, so that the control channel transmitted by the network side on the second carrier is different from the control channel transmitted by other one or more user equipments on the second carrier, Thereby avoiding the control channel conflict with other one or more user equipments on the second carrier, so the user equipment and the above-mentioned one or more other user equipments can be scheduled on the second carrier at the same time, ensuring that the user equipment and the high data rate of the one or more other user equipments, so when the control channels of two or more user equipments collide on the first carrier, the control channels of the two or more user equipments on the second No collisions occur on the carrier.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program. The program can be stored in a computer-readable storage medium, and the program can be executed when executed , executing some or all of the steps in the foregoing method embodiments provided by the embodiments of the present invention.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

The method, device, and user equipment for reducing control channel conflicts provided by the embodiments of the present invention are described above in detail. The descriptions of the above embodiments are only used to help understand the method and ideas of the present invention; at the same time, general techniques in the field Personnel, according to the idea of the present invention, there will be changes in the specific implementation and the scope of application. In summary, the content of this specification should not be construed as limiting the present invention.

Claims (17)

1. A method for reducing control channel conflicts, comprising: The starting position determining means determines at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier, the user equipment corresponds to the user equipment identifier, and the at least two carriers include the first carrier and the second carrier Carrier, the at least two iteration initial values include a first iteration initial value and a second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial The value corresponds, and the initial value of the first iteration is different from the initial value of the second iteration; The starting position determining means determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the starting position of the user equipment in the search space of the control channel according to the second iteration initial value. The starting position of the search space of the control channel on the second carrier. 2. The method for reducing control channel conflicts according to claim 1, wherein the step of determining at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier is specifically as follows: : The means for determining the origin position acquires at least two user equipment identities of the user equipment on the at least two carriers, where the user equipment identities correspond to the carriers one by one; The starting position determining means determines the at least two iteration initial values of the user equipment on the carrier by using the user equipment identifier corresponding to the carrier. 3. The method for reducing control channel conflicts according to claim 1, wherein the step of determining at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier is specifically as follows: : The means for determining the origin position obtains the same user equipment identity of the user equipment on the at least two carriers; The means for determining the starting position determines the at least two initial iteration values according to the correspondence between the user equipment identifier and the initial iteration values. 4. The method for reducing control channel conflicts according to any one of claims 1 to 3, characterized in that, the device for determining the starting position is a network-side device, and the network-side device determines the first iteration initial value according to the first iteration initial value. After the starting position of the search space of the control channel of the user equipment on the first carrier is determined according to the initial value of the second iteration, the starting position of the search space of the control channel of the user equipment on the second carrier is determined Further includes: The network side device transmits the control channel of the user equipment on the first carrier in the search space of the control channel on the first carrier, and transmits the user equipment in the search space of the control channel on the second carrier A control channel on a second carrier. 5. The method for reducing control channel conflicts according to any one of claims 1 to 3, wherein the device for determining the starting position is a user equipment; The user equipment determines the starting position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determines the user equipment in the After the starting position of the search space of the control channel on the second carrier further includes: The user equipment detects in the search space of the control channel of the user equipment on the first carrier according to the starting position of the search space of the control channel of the user equipment on the first carrier the control channel on the second carrier; the user equipment detects that the user equipment is in A control channel on the second carrier. 6. The method for reducing control channel conflicts according to any one of claims 1 to 3, wherein the initial value of the first iteration is different from the initial value of the second iteration, specifically: The initial value of the first iteration is different from the initial value of the second iteration by a constant. 7. The method for reducing control channel conflicts according to claim 6, wherein the constant, the initial value of the first iteration and the initial value of the second iteration satisfy the following relationship: A remainder obtained by moduloing a preset fixed value of the product of the constant and the initial value of the first iteration is equal to the initial value of the second iteration. 8. The method for reducing control channel conflicts according to claim 7, wherein the constant takes a value from a preset value set. 9. the method for reducing control channel conflict as claimed in claim 8, is characterized in that, described preset value set is the set that is made of element (A^n mod D), wherein the value set of n is { 1, 2, ..., N}, D is the preset fixed value, A is a fixed value, N is the number of user equipment identifiers, and A^n represents A to the nth power. 10. The method for reducing control channel conflicts as claimed in claim 9, wherein said constant is selected from elements (A^n mod D) where n is greater than or equal to M, and said M is the number of elements in a time transmission cycle The number of time transfer units. 11. The method for reducing control channel conflicts according to any one of claims 1 to 3, characterized in that there is a constant difference between any two iteration initial values among the at least two iteration initial values. 12. The method for reducing control channel conflicts according to any one of claims 1 to 3, wherein the number of the at least two carriers is three or more; The first carrier and the second carrier are any two of the three or more carriers. 13. A device for reducing control channel conflicts, comprising: An iteration initial value determining unit, configured to determine at least two iteration initial values of the user equipment on at least two carriers according to the user equipment identifier, the user equipment corresponds to the user equipment identifier, and the at least two carriers include the first A carrier and a second carrier, the at least two iteration initial values include a first iteration initial value and a second iteration initial value, the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the The second iteration initial value corresponds, and the first iteration initial value is different from the second iteration initial value; A start position determining unit, configured to determine the start position of the search space of the control channel of the user equipment on the first carrier according to the first iteration initial value, and determine the start position of the user equipment according to the second iteration initial value The starting position of the search space of the control channel on the second carrier. 14. The device for reducing control channel conflicts according to claim 13, wherein the iterative initial value determining unit comprises: An obtaining unit, configured to obtain at least two user equipment identities of the user equipment on the at least two carriers, the user equipment identities are in one-to-one correspondence with the carriers, and the user equipment is corresponding to the user equipment identities , the at least two carriers include a first carrier and a second carrier; A determining unit, configured to use the user equipment identifier corresponding to the carrier to determine the at least two initial iteration values of the user equipment on the carrier, where the at least two initial iteration values include a first initial iteration value and the initial value of the second iteration, the first carrier corresponds to the initial value of the first iteration, the second carrier corresponds to the initial value of the second iteration, the initial value of the first iteration corresponds to the second The initial value of iteration is different. 15. The device for reducing control channel conflicts according to claim 13, wherein the iterative initial value determining unit comprises: an obtaining unit, configured to obtain the same user equipment identity of the user equipment on the at least two carriers, the user equipment corresponds to the user equipment identity, and the at least two carriers include a first carrier and a second carrier Carrier; A determining unit, configured to determine the at least two initial iteration values according to the correspondence between the user equipment identifier and the initial iteration value, where the at least two initial iteration values include a first initial iteration value and a second initial iteration value , the first carrier corresponds to the first iteration initial value, the second carrier corresponds to the second iteration initial value, and the first iteration initial value is different from the second iteration initial value. 16. A network-side device comprising the device for reducing control channel conflicts according to any one of claims 13 to 15, further comprising: A transmitting unit, configured to transmit the control channel of the user equipment on the first carrier in the search space of the control channel on the first carrier, and transmit the user equipment in the search space of the control channel on the second carrier A control channel on a second carrier. 17. A user equipment comprising the apparatus for reducing control channel conflicts according to any one of claims 13 to 15, further comprising: a detecting unit, configured to detect the user equipment in the first A control channel on a carrier; according to the starting position of the search space of the control channel of the user equipment on the second carrier, the search space of the control channel on the second carrier detects that the user equipment is in the second carrier Control channel on two carriers.

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