CN105472570A - Base station/terminal and PDCCH scrambling/descrambling method and device thereof - Google Patents
Base station/terminal and PDCCH scrambling/descrambling method and device thereof Download PDFInfo
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- CN105472570A CN105472570A CN201410447007.8A CN201410447007A CN105472570A CN 105472570 A CN105472570 A CN 105472570A CN 201410447007 A CN201410447007 A CN 201410447007A CN 105472570 A CN105472570 A CN 105472570A
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- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The invention discloses a PDCCH scrambling method. When a base station system supports a cluster data service, the PDCCH scrambling method comprises the steps of: dispatching the cluster data service or an LTE data service according to a preset dispatching graph; scrambling a PDCCH by utilizing a T-RNTI for the cluster data service on cluster subframes, allocating CCE resources by using a first preset CCE aggregation degree in a common search space, and allocating CCE resources by using a second preset CCE aggregation degree in a dedicated search space; and scrambling the PDCCH by utilizing a C-RNTI for the LTE data service on LTE subframes, allocating CCE resources by using a third preset CCE aggregation degree in the common search space, and allocating CCE resources by using a fourth preset CCE aggregation degree in the dedicated search space, wherein the second preset CCE aggregation degree and the fourth preset CCE aggregation degree are completely different. The invention discloses a PDCCH descrambling method accordingly, and discloses a base station, a terminal, a PDCCH scrambling device and a PDCCH descrambling device.
Description
Technical Field
The present invention relates to the field of trunking communication, and in particular, to a method and an apparatus for scrambling/descrambling a base station/terminal and a Physical Downlink Control Channel (PDCCH) thereof.
Background
In a Long Term Evolution (LTE) system, different Radio Network Temporary Identifiers (RNTIs) are used for scrambling/descrambling different services, for example, a system broadcast message may use a system information radio network temporary identifier (SI-RNTI), and a random access radio network temporary identifier (RA-RNTI) is used for a random access service, and in addition, a cell radio network temporary identifier (C-RNTI), a paging radio network temporary identifier (paging RNTI, P-RNTI), and the like are also specified in the LTE protocol. When the trunking data service is networked in a public network environment, because the trunking data service and the general LTE data service are concurrent, in addition to the RNTI supported by the LTE protocol, it is necessary to scramble the trunking data service with other RNTIs, such as scrambling the trunking data service with a trunking radio network temporary identifier (T-RNTI), scrambling the trunking paging service with a trunking paging radio network temporary identifier (TP-RNTI), and the like.
The terminal can demodulate corresponding Physical Downlink Shared Channel (PDSCH) data after demodulating Downlink Control Information (DCI) through PDCCH blind detection, and the LTE protocol defines a concept of a search space in order to avoid computational complexity caused by sequential search of the terminal according to a Control Channel Element (CCE), limits possible positions of PDCCHs of different formats in the system, and reduces complexity of blind detection performed by the terminal. The LTE protocol is divided into a common search space and a special search space, the common search space occupies CCEs (control channel elements) from 0 to 16 as the maximum number, the terminal needs to search according to CCE polymerization degrees of 4 and 8, and the PDCCH search needs to be performed for 6 times at most. The starting position and the common space of the dedicated space search are different, not starting from 0, but depending on the C-RNTI and subframe number of the terminal, and the PDCCH type, so the dedicated search space is also different and may overlap with the common search space as subframes are different. The dedicated space search needs to be performed from the start position according to CCE aggregation levels 1, 2, 4, and 8, and needs to be performed 16 PDCCH searches at most. Therefore, when the terminal performs PDCCH blind detection, it needs to attempt decoding on DCI that may occur every millisecond, and the total number of times needs to be performed 44 times at most.
If the cluster data service and the LTE data service coexist, and the terminal needs to decode DCI corresponding to the cluster, a maximum of 44 searches are additionally added, which greatly increases the complexity of PDCCH search of the terminal, thereby increasing the power consumption of the terminal. In a system with a cluster and an LTE common network, in order to reduce the problem that the complexity of PDCCH search is increased due to the fact that a terminal demodulates two services at the same time, a scheduling map is introduced in the prior art. The scheduling map specifies whether a subframe of the system schedules LTE data service or trunking data service. Correspondingly, the terminal demodulates the corresponding service of the subframe according to the scheduling map. Obviously, with this method, the system needs to inform the terminal of the scheduling map in advance, and thus the efficiency is relatively low.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention desirably provide a base station/terminal and a PDCCH scrambling/descrambling method and apparatus thereof, which reduce CCE search complexity when the terminal demodulates a trunking data service and an LTE data service simultaneously, without notifying a terminal scheduling map in advance.
The technical scheme of the embodiment of the invention is realized as follows:
the embodiment of the invention provides a PDCCH scrambling method, when a base station system supports cluster data service, the method comprises the following steps:
dispatching cluster data service or LTE data service according to a preset dispatching map;
scrambling PDCCH by using T-RNTI for cluster data service on a cluster subframe, distributing CCE resources by using a first preset CCE polymerization degree in a public search space, and distributing CCE resources by using a second preset CCE polymerization degree in a special search space;
C-RNTI scrambling PDCCH is used for LTE data service on an LTE subframe, CCE resources are distributed in a public search space by using a third preset CCE polymerization degree, and CCE resources are distributed in a special search space by using a fourth preset CCE polymerization degree;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
In the foregoing solution, when the base station system does not support the trunking data service, the method further includes:
all subframes are used as LTE subframes to be scheduled;
and scrambling PDCCH by using C-RNTI for LTE data service on all subframes, allocating CCE resources by using a fifth preset CCE polymerization degree in a public search space, and allocating CCE resources by using a sixth preset CCE polymerization degree in a special search space.
The embodiment of the invention also provides a PDCCH descrambling method, when the base station system supports the cluster data service, the method comprises the following steps:
in a public search space, when using T-RNTI for descrambling, calculating a first address according to the first preset CCE polymerization degree; when using C-RNTI for descrambling, calculating the first address according to the third CCE polymerization degree;
in the special search space, when using T-RNTI for descrambling, calculating the first address according to the second preset CCE polymerization degree; when using the C-RNTI for descrambling, performing first address calculation according to the fourth preset CCE polymerization degree;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
In the foregoing solution, when the base station system does not support the trunking data service, the method further includes:
descrambling is carried out by using the C-RNTI, the first address calculation is carried out by using a fifth preset CCE polymerization degree in a public search space, and the first address calculation is carried out by using a sixth preset CCE polymerization degree in a special search space.
The embodiment of the invention also provides a PDCCH scrambling device, and when supporting the cluster data service, the device comprises: the system comprises a scheduling module, a cluster scrambling module and an LTE scrambling module; wherein,
the scheduling module is used for scheduling the cluster data service and the LTE data service according to a preset scheduling map;
the cluster scrambling module is used for scrambling a PDCCH by using a T-RNTI for cluster data services on a cluster subframe, distributing CCE resources by using a first preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a second preset CCE polymerization degree in a special search space;
the LTE scrambling module is used for scrambling a PDCCH by using a C-RNTI for LTE data service on an LTE subframe, distributing CCE resources by using a third preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a fourth preset CCE polymerization degree in a special search space;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
In the foregoing solution, when the cluster data service is not supported, the apparatus further includes: a common scheduling module and a common scrambling module; wherein,
the common scheduling module is used for scheduling all subframes as LTE subframes;
the common scrambling module is used for scrambling the PDCCH by using C-RNTI for LTE data services on all subframes, distributing CCE resources by using a fifth preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a sixth preset CCE polymerization degree in a special search space.
The embodiment of the invention also provides a PDCCH descrambling device, and when supporting the cluster data service, the device comprises: a public descrambling module and a dedicated descrambling module; wherein
The public descrambling module is used for performing first address calculation according to the first preset CCE polymerization degree when using T-RNTI for descrambling in a public search space; when using the C-RNTI for descrambling, calculating a first address according to the third preset CCE polymerization degree;
the special descrambling module is used for performing first address calculation according to the second preset CCE polymerization degree when using the T-RNTI for descrambling in a special search space; when using the C-RNTI for descrambling, performing first address calculation according to the fourth preset CCE polymerization degree;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
In the foregoing solution, when the cluster data service is not supported, the apparatus further includes:
and the common descrambling module is used for descrambling by using the C-RNTI, performing first address calculation by using a fifth preset CCE polymerization degree in a public search space and performing first address calculation by using a sixth preset CCE polymerization degree in a special search space.
An embodiment of the present invention further provides a base station, where the base station includes: the PDCCH scrambling device in the scheme is provided.
An embodiment of the present invention further provides a terminal, where the terminal includes: the PDCCH descrambling device in the scheme.
According to the base station/terminal and the PDCCH scrambling/descrambling method and device thereof provided by the embodiment of the invention, CCE resources are respectively allocated to the cluster data service and the LTE data service by using the preset CCE polymerization degrees which are not completely the same in the public search space through the base station, the CCE resources are respectively allocated to the cluster data service and the LTE data service by using the preset CCE polymerization degrees which are completely different in the special search space, and the terminal can reduce the CCE search complexity when the cluster data service and the LTE data service are demodulated simultaneously according to the preset CCE polymerization degrees which are respectively corresponding to the cluster data service and the LTE data service in the public search space and the special search space.
Drawings
Fig. 1 is a schematic flow chart illustrating an implementation process of a PDCCH scrambling method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a PDCCH scrambling apparatus according to an embodiment of the present invention;
Detailed Description
In order to more clearly illustrate the embodiments and technical solutions of the present invention, the technical solutions of the present invention will be described in more detail with reference to the accompanying drawings and embodiments. Embodiments of the basic invention, as well as all other embodiments that may be derived by one of ordinary skill in the art without inventive faculty, are intended to be within the scope of the present invention.
The embodiment of the invention is as follows: and the base station respectively allocates CCE resources for the cluster data service and the LTE data service by using preset CCE polymerization degrees which are not completely the same in the public search space, and respectively allocates CCE resources for the cluster data service and the LTE data service by using preset CCE polymerization degrees which are completely different in the special search space. Therefore, the terminal can reduce CCE searching complexity when demodulating the cluster data service and the LTE data service simultaneously according to the CCE polymerization degrees respectively corresponding to the preset cluster data service and the LTE data service in the public searching space and the special searching space.
In the embodiment of the invention, the base station and the terminal can determine whether the base station system supports the trunking data service, and the base station can inform the terminal whether the base station system supports the trunking data service by broadcasting SIB messages. The base station can also agree with the terminal to respectively use CCE polymerization degrees in a public search space and a special search space for cluster data service and LTE data service under different conditions.
Specifically, when the base station system supports the cluster data service, a first preset CCE aggregation level is used in a public search space for the cluster data service, a second preset CCE aggregation level is used in a dedicated search space, a third preset CCE aggregation level is used in the public search space for the LTE data service, and a fourth preset CCE aggregation level is used in the dedicated search space; and when the base station system does not support the cluster data service, using a fifth preset CCE polymerization degree in a public search space and using a sixth preset CCE polymerization degree in a special search space for the LTE data service.
The method for the base station and the terminal to agree on CCE aggregation levels corresponding to the two services in different search spaces under different conditions may include: firstly, the CCE aggregation is solidified in a base station and terminal equipment, namely CCE aggregation degrees corresponding to the two services in different search spaces under different conditions are preset in the factory-delivered base station and terminal equipment; and secondly, when the base station and the terminal are actually used, the CCE polymerization degrees of the two services corresponding to the public search space and the special search space under different conditions are agreed in a communication negotiation mode, and are stored in respective configuration files.
The base station is preset with a scheduling map, and when the base station is configured to support the trunking data service, the base station schedules the trunking data service and the LTE data service according to the preset scheduling map. The scheduling map is used to define the subframe configuration proportion of the base station for scheduling different types of services, for example: in FDD mode, the scheduling map is defined as: {0,0,1,0,0,0, 0}, i.e., indicating subframe No. 2 is used for scheduling trunking data traffic, and is called trunking subframe; other subframes are used for scheduling LTE data traffic, called LTE subframes; correspondingly, in the TDD mode, the scheduling map can be defined by the ratio of each timeslot.
Fig. 1 is a schematic diagram illustrating an implementation process of a PDCCH scrambling method according to an embodiment of the present invention, and as shown in fig. 1, when a base station system supports a trunking data service, the method includes:
step 101, scheduling cluster data services and LTE data services according to a preset scheduling map;
specifically, the base station schedules the trunking data service and the LTE data service according to a preset scheduling map, and different types of services can only be scheduled by using corresponding subframes. As in the above embodiment, in FDD mode, the scheduling map is defined as: {0,0,1,0,0,0, 0}, then the trunking data service can only be scheduled with subframe number 2, and the LTE data service is scheduled with other subframes.
102, scrambling PDCCH by using T-RNTI for cluster data service on a cluster subframe, distributing CCE resources by using a first preset CCE polymerization degree in a public search space, and distributing CCE resources by using a second preset CCE polymerization degree in a special search space;
specifically, when cluster data service exists on a cluster subframe, a base station scrambles a PDCCH by using a T-RNTI, and allocates CCE resources for the cluster subframe by using a first preset CCE polymerization degree in a public search space, and allocates CCE resources for the cluster subframe by using a second preset CCE polymerization degree in a special search space.
In implementation 1, the first preset CCE aggregation level and the second preset CCE aggregation level are both 8.
103, scrambling PDCCH by using C-RNTI for LTE data service on an LTE subframe, distributing CCE resources by using a third preset CCE polymerization degree in a public search space, and distributing CCE resources by using a fourth preset CCE polymerization degree in a special search space;
specifically, when an LTE subframe has LTE data service, the base station uses C-RNTI to scramble PDCCH, and uses a third preset CCE polymerization degree to allocate CCE resources for the LTE subframe in a public search space, and uses a fourth preset CCE polymerization degree to allocate CCE resources for the LTE subframe in a special search space.
In implementation 1, the third preset CCE aggregation level is 4, 8, and the fourth preset CCE aggregation level is 1, 2, 4.
In the above embodiment, the second predetermined CCE aggregation level and the fourth predetermined CCE aggregation level are all different. In order to reduce the search complexity of the terminal during blind detection, the terminal can distinguish whether descrambling is performed by using C-RNTI or descrambling is performed by using T-RNTI in a special search space according to different CCE polymerization degrees, so that a second preset CCE polymerization degree and a fourth preset CCE polymerization degree need to be distinguished, namely the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are set to be completely different CCE polymerization degrees. The complexity of the terminal in the public search space is not high, and the search can be carried out for 6 times at most, so that the first preset CCE polymerization degree and the third preset CCE polymerization degree are partially overlapped, and the search complexity in the terminal blind detection process cannot be greatly influenced, and the first preset CCE polymerization degree and the third preset CCE polymerization degree are not identical to each other as far as possible. In practical application, the allocation of CCE aggregation levels for distinguishing C-RNTI and T-RNTI scrambling is not limited to the description of implementation 1, and as in implementation 2, it may be preset that a cluster data service uses CCE aggregation levels of 4 in a common search space and CCE aggregation levels of 4 in a dedicated search space; the LTE data service uses CCE aggregation levels 4 and 8 in the common search space and CCE aggregation levels 1, 2, and 8 in the dedicated search space.
And when the base station system does not support the cluster data service, the PDCCH scrambling method further comprises:
the base station takes all the subframes as LTE subframes to carry out scheduling; and scrambling PDCCH by using C-RNTI for LTE data service on all subframes, allocating CCE resources by using a fifth preset CCE polymerization degree in a public search space, and allocating CCE resources by using a sixth preset CCE polymerization degree in a special search space.
In implementation 3, the fifth preset CCE aggregation level is 4, 8, and the sixth preset CCE aggregation level is 1, 2, 4, 8.
Correspondingly, the embodiment of the invention also provides a PDCCH descrambling method, when the base station system supports the cluster data service, the terminal carries out blind detection, and the method comprises the following steps:
when the terminal uses the T-RNTI to descramble in a public search space, performing first address calculation according to the first preset CCE polymerization degree; when using the C-RNTI for descrambling, calculating a first address according to the third preset CCE polymerization degree;
when the terminal uses the T-RNTI for descrambling in the special search space, calculating a first address according to the second preset CCE polymerization degree; when using the C-RNTI for descrambling, performing first address calculation according to the fourth preset CCE polymerization degree; and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
The second preset CCE polymerization degree is completely different from the fourth preset CCE polymerization degree, so that the search complexity of the terminal in a special search space during blind detection can be greatly reduced.
Specifically, corresponding to the implementation mode 1, when a terminal uses a T-RNTI to descramble in a public search space, the terminal calculates a first address according to a CCE polymerization degree of 8; when using C-RNTI for descrambling, calculating the first address according to CCE polymerization degrees 4 and 8; when the terminal uses T-RNTI for descrambling in a special search space, calculating a first address according to the CCE polymerization degree of 8; and when using the C-RNTI for descrambling, calculating the first address according to CCE polymerization degrees 1, 2 and 4.
And when the base station system does not support the cluster data service, the terminal performs blind detection, and the PDCCH descrambling method further comprises the following steps:
and the terminal uses the C-RNTI for descrambling, the fifth preset CCE polymerization degree is used for carrying out the first address calculation in the public search space, and the sixth preset CCE polymerization degree is used for carrying out the first address calculation in the special search space.
Specifically, according to implementation 3, the terminal descrambles using the C-RNTI, performs the first address calculation using the CCE aggregation levels 4 and 8 in the common search space, and performs the first address calculation using the CCE aggregation levels 1, 2, 4, and 8 in the dedicated search space.
Fig. 2 is a schematic structural diagram of a PDCCH scrambling apparatus provided in an embodiment of the present invention, and when a base station system supports a trunking service, as shown in fig. 2, the apparatus includes: a scheduling module 21, a cluster scrambling module 22 and an LTE scrambling module 23; wherein,
the scheduling module 21 is configured to schedule the cluster data service and the LTE data service according to a preset scheduling map;
the cluster scrambling module 22 is configured to scramble the PDCCH with the T-RNTI, allocate CCE resources in a public search space with a first preset CCE aggregation level, and allocate CCE resources in a private search space with a second preset CCE aggregation level for cluster data services on a cluster subframe;
the LTE scrambling module 23 is configured to scramble the PDCCH by using the C-RNTI for the LTE data service on the LTE subframe, allocate CCE resources by using a third preset CCE aggregation level in the public search space, and allocate CCE resources by using a fourth preset CCE aggregation level in the special search space;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
And when the base station system does not support the trunking service, the PDCCH scrambling apparatus further comprises: a common scheduling module and a common scrambling module; wherein,
the common scheduling module is used for scheduling all subframes as LTE subframes;
the common scrambling module is used for scrambling the PDCCH by using C-RNTI for LTE data services on all subframes, distributing CCE resources by using a fifth preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a sixth preset CCE polymerization degree in a special search space.
In practical applications, each of the modules may be implemented by a Central Processing Unit (CPU), a microprocessor unit (MPU), a Digital Signal Processor (DSP), or a Field Programmable Gate Array (FPGA) in the base station.
Correspondingly, an embodiment of the present invention further provides a PDCCH descrambling apparatus, where when a base station system supports a trunking data service, the apparatus includes: a public descrambling module and a dedicated descrambling module; wherein
The public descrambling module is used for performing first address calculation according to the first preset CCE polymerization degree when using T-RNTI for descrambling in a public search space; when using C-RNTI for descrambling, calculating the first address according to the third CCE polymerization degree;
the special descrambling module is used for performing first address calculation according to the second preset CCE polymerization degree when using the T-RNTI for descrambling in a special search space; when using the C-RNTI for descrambling, performing first address calculation according to the fourth preset CCE polymerization degree;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
And when the base station system does not support the trunking service, the PDCCH descrambling device further comprises:
and the common descrambling module is used for descrambling by using the C-RNTI, performing first address calculation by using a fifth preset CCE polymerization degree in a public search space and performing first address calculation by using a sixth preset CCE polymerization degree in a special search space.
In practical applications, each of the modules may be implemented by a Central Processing Unit (CPU), a microprocessor unit (MPU), a Digital Signal Processor (DSP), or a Field Programmable Gate Array (FPGA) in the terminal.
In addition, an embodiment of the present invention further provides a base station, where the base station includes: the PDCCH scrambling apparatus provided in the foregoing embodiments.
Correspondingly, an embodiment of the present invention further provides a terminal, where the terminal includes: the PDCCH descrambling apparatus provided by the above embodiments.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A Physical Downlink Control Channel (PDCCH) scrambling method is characterized in that when a base station system supports trunking data services, the method comprises the following steps:
dispatching cluster data service or LTE data service according to a preset dispatching map;
scrambling PDCCH by using cluster radio network temporary identifier T-RNTI for cluster data service on a cluster subframe, distributing CCE resources by using a first preset CCE polymerization degree in a public search space, and distributing CCE resources by using a second preset CCE polymerization degree in a special search space;
scrambling a PDCCH by using a cell radio network temporary identifier (C-RNTI) for LTE data service on a long term evolution protocol (LTE) subframe, distributing CCE resources by using a third preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a fourth preset CCE polymerization degree in a special search space;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
2. The PDCCH scrambling method according to claim 1, wherein when the base station system does not support trunking data services, the method further comprises:
all subframes are used as LTE subframes to be scheduled;
and scrambling PDCCH by using C-RNTI for LTE data service on all subframes, allocating CCE resources by using a fifth preset CCE polymerization degree in a public search space, and allocating CCE resources by using a sixth preset CCE polymerization degree in a special search space.
3. A PDCCH descrambling method is characterized in that when a base station system supports trunking data service, the method comprises the following steps:
in a public search space, when using T-RNTI for descrambling, calculating a first address according to the first preset CCE polymerization degree; when using C-RNTI for descrambling, calculating the first address according to the third CCE polymerization degree;
in the special search space, when using T-RNTI for descrambling, calculating the first address according to the second preset CCE polymerization degree; when using the C-RNTI for descrambling, performing first address calculation according to the fourth preset CCE polymerization degree;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
4. The PDCCH descrambling method of claim 3, wherein when the base station system does not support trunking data services, the method further comprises:
descrambling is carried out by using the C-RNTI, the first address calculation is carried out by using a fifth preset CCE polymerization degree in a public search space, and the first address calculation is carried out by using a sixth preset CCE polymerization degree in a special search space.
5. A PDCCH scrambling apparatus, wherein when supporting trunking data services, the apparatus comprises: the system comprises a scheduling module, a cluster scrambling module and an LTE scrambling module; wherein,
the scheduling module is used for scheduling the cluster data service and the LTE data service according to a preset scheduling map;
the cluster scrambling module is used for scrambling a PDCCH by using a T-RNTI for cluster data services on a cluster subframe, distributing CCE resources by using a first preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a second preset CCE polymerization degree in a special search space;
the LTE scrambling module is used for scrambling a PDCCH by using a C-RNTI for LTE data service on an LTE subframe, distributing CCE resources by using a third preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a fourth preset CCE polymerization degree in a special search space;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
6. The PDCCH scrambling apparatus of claim 5, wherein when trunking data traffic is not supported, the apparatus further comprises: a common scheduling module and a common scrambling module; wherein,
the common scheduling module is used for scheduling all subframes as LTE subframes;
the common scrambling module is used for scrambling the PDCCH by using C-RNTI for LTE data services on all subframes, distributing CCE resources by using a fifth preset CCE polymerization degree in a public search space, and distributing the CCE resources by using a sixth preset CCE polymerization degree in a special search space.
7. A PDCCH descrambling apparatus, wherein when supporting a trunking data service, the apparatus comprises: a public descrambling module and a dedicated descrambling module; wherein
The public descrambling module is used for performing first address calculation according to the first preset CCE polymerization degree when using T-RNTI for descrambling in a public search space; when using the C-RNTI for descrambling, calculating a first address according to the third preset CCE polymerization degree;
the special descrambling module is used for performing first address calculation according to the second preset CCE polymerization degree when using the T-RNTI for descrambling in a special search space; when using the C-RNTI for descrambling, performing first address calculation according to the fourth preset CCE polymerization degree;
and the second preset CCE polymerization degree and the fourth preset CCE polymerization degree are all different.
8. The PDCCH descrambling apparatus of claim 7, wherein when trunking data traffic is not supported, the apparatus further comprises:
and the common descrambling module is used for descrambling by using the C-RNTI, performing first address calculation by using a fifth preset CCE polymerization degree in a public search space and performing first address calculation by using a sixth preset CCE polymerization degree in a special search space.
9. A base station, characterized in that the base station comprises: the PDCCH scrambling apparatus of claim 5 or 6.
10. A terminal, characterized in that the terminal comprises: the PDCCH descrambling device of claim 7 or 8.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447007.8A CN105472570A (en) | 2014-09-03 | 2014-09-03 | Base station/terminal and PDCCH scrambling/descrambling method and device thereof |
| RU2017110913A RU2659407C1 (en) | 2014-09-03 | 2015-01-23 | Base station/terminal, method and device for scrambling/descrambling pdcch channel |
| PCT/CN2015/071484 WO2016033935A1 (en) | 2014-09-03 | 2015-01-23 | Base station/terminal, and method and device for pdcch scrambling/descrambling thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447007.8A CN105472570A (en) | 2014-09-03 | 2014-09-03 | Base station/terminal and PDCCH scrambling/descrambling method and device thereof |
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| CN105472570A true CN105472570A (en) | 2016-04-06 |
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| CN201410447007.8A Withdrawn CN105472570A (en) | 2014-09-03 | 2014-09-03 | Base station/terminal and PDCCH scrambling/descrambling method and device thereof |
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| Country | Link |
|---|---|
| CN (1) | CN105472570A (en) |
| RU (1) | RU2659407C1 (en) |
| WO (1) | WO2016033935A1 (en) |
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| CN108574558A (en) * | 2017-03-13 | 2018-09-25 | 华为技术有限公司 | The method and apparatus of transmission control information |
| CN110677911A (en) * | 2018-07-03 | 2020-01-10 | 电信科学技术研究院有限公司 | Method and device for sending configuration information of physical downlink control channel |
| CN111742517A (en) * | 2018-02-23 | 2020-10-02 | 高通股份有限公司 | Physical Downlink Control Channel (PDCCH) Aggregation Level (AL) design for New Radio (NR) ultra-reliable low latency communications (URLLC) |
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| CN112839306B (en) * | 2021-01-11 | 2022-08-02 | 浪潮通信技术有限公司 | Method, system and device for transmitting cluster broadcast message supported by 5G NR (noise generation and noise reduction) |
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Also Published As
| Publication number | Publication date |
|---|---|
| RU2659407C1 (en) | 2018-07-02 |
| WO2016033935A1 (en) | 2016-03-10 |
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