WO2011143904A1

WO2011143904A1 - Methods and devices for mapping resources on broadcast control channel and data channel

Info

Publication number: WO2011143904A1
Application number: PCT/CN2010/078689
Authority: WO
Inventors: 关艳峰; 方惠英; 曲红云; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-17
Filing date: 2010-11-12
Publication date: 2011-11-24
Also published as: CN102255841B; CN102255841A

Abstract

The present invention discloses methods and devices for mapping resources on Broadcast Control Channel (BCCH) and Data Channel (DCH). Among them, the method for mapping resources on BCCH includes: dividing part of or all available sub-carriers in the area where BCCH lies into n physical resource units, wherein the bandwidth occupied by the part of sub-carriers is bigger than or equal to minimum system bandwidth; and mapping the n physical resource units to distributed resource units, wherein the sub-carriers are discontinuous in the distributed resource units or continuous per L sub-carriers, L≥=2. The present invention improves the flexibility of wireless resource scheduling and enhances the frequency utilization ratio in multi-carrier system.

Description

The present invention relates to the field of communications, and in particular to a broadcast control channel, a data channel resource mapping method and apparatus. In a wireless communication system, a base station refers to a device that provides services for a terminal. In a wireless communication system in which a base station implements radio resource scheduling control, a scheduling allocation of a system radio resource is performed by a base station, for example, a downlink is given by a base station. Resource allocation information of links (base station to terminal) and uplink (terminal to base station). The resource scheduling information indicates information such as a resource location and a transmission method used for transmission, and the base station generally uses a logical resource when the resource is scheduled, and generally processes and/or methods for mapping the physical resource into a logical resource, which is called a resource mapping, or a subchannel. Chemical. Communication systems based on different technologies have different requirements and methods for resource mapping. For a wireless communication system based on Time Division Multiple Address (TDMA) technology, such as the Global System for Mobile communication (GSM), which belongs to a single carrier system, when the base station is scheduling radio resources Generally, the radio resources are divided into consecutive radio frames in the time domain, wherein each radio frame includes 8 slots, which are used for data and signaling transmission between the base station and the terminal, and resource mapping and resource mapping based resource allocation processes are relatively Simple; For a wireless communication system based on Code Division Multiple Address (CDMA) technology, it distinguishes channels and terminals by CDMA codes, and resource mapping and resource mapping based resource allocation are relatively simple. In a third-generation wireless communication system that combines the dual technologies of TDMA and CDMA, for example, in a Time-Division Synchronous Code Division Multiple Address (TD-SCDMA) system, the base station will also have an air interface. The radio resources are divided into radio frames with a period of 10 ms, and each 10 ms includes 14 regular time slots and 6 special time slots, wherein the regular time slots are used to transmit specific services and signaling, and on each regular time slot, The base station distinguishes users by different codewords, and the resource mapping process is not complicated. The main reason is that the above system is not based on Orthogonal Frequency Division Multiple Address (OFDMA) technology, OFDMA belongs to multi-carrier system, and the control strategy of TDMA and CDMA systems is relatively simple. E.g, It uses frequency reuse technology to achieve large area coverage through multiplexing of multiple frequency points. For a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM) technology, the process and requirements of resource mapping are quite different. OFDM is a high-speed transmission technology in a wireless environment, which converts high-speed serial data into multiple relatively low-speed parallel data, and modulates the multiple parallel data onto mutually orthogonal subcarriers for transmission. The pulse width of the symbol improves the performance against multipath fading. The Orthogonal Frequency Division Multiple Access (OFDMA) technology is based on the OFDM technology, and achieves multiple access by allowing users to occupy different subcarriers. OFDM/OFDMA belong to a multi-carrier system, and in order to ensure the diversity gain of the radio resources occupied by the terminal, control channel transmission efficiency, etc., the base station needs to support various resource types, multiple resource granularity and other technical features, in order to effectively reduce The interference control technology of the OFDMA system is relatively flexible and complex, and the Fractional Frequency Reuse (FFR) technology can be used, which is the resource mapping process for the OFDMA-based wireless communication system. Propose new constraints and new requirements. This new constraint and new requirements are especially reflected in the resource mapping process of the broadcast control channel and the data channel in the OFDMA system. Specifically, in the OFDMA system, the base station transmits a Broadcast Control Channel (BCCH) to the broadcast control channel (BCCH). The terminal sends necessary system configuration and control information, wherein the system configuration and control information is used to indicate the control structure of the entire system, and particularly indicates the configuration of system resources. During the communication between the base station and the terminal, the terminal needs to correctly decode the BCCH. The BCCH needs to meet high coverage and low error rate to ensure correct decoding in a bad wireless channel environment. And, usually, the terminal is required to The shortest delay correctly decodes the BCCH to ensure that the delay of the initial access of the terminal and the scheduling delay of the normal transmission are small. The data channel, which uses multi-carrier technology, carries a larger amount of data, and the resource scheduling is more flexible. It should be noted that the broadcast control channel has different names in different specifications, such as a frame header or a super frame header, but is functionally identical, and transmits necessary system configuration and/or control information. The resource mapping process based on time slots or codewords for resource units in the related art can no longer satisfy the problem of the requirements of broadcasting control channels and data channels in an OFDMA system, and no effective solution has been proposed yet. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a broadcast control channel, a data channel resource mapping method and apparatus, to solve at least one of the above problems. In order to achieve the above object, according to an aspect of the present invention, a broadcast control channel resource mapping method is provided. The broadcast control channel resource mapping method according to the present invention includes: dividing part or all of the available subcarriers of the area where the broadcast control channel is located into n physical resource units, wherein a part of the subcarriers occupy a bandwidth greater than or equal to a minimum system bandwidth; The physical resource unit is mapped to a distributed resource unit, wherein the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2. Further, the area is one of the following: a subframe, a frequency partition, where the frequency partition refers to a resource area that includes multiple resource units. Further, n physical resource units are mapped to distributed logical resource units by subcarrier replacement. Further, the subcarrier replacement operation is related to the cell identity ID carried in the synchronization channel. Further, the subcarrier replacement operation uses one or a combination of the following: row and column permutation, circular permutation mapping, singular decimation permutation, specific sequence permutation, and random permutation. In order to achieve the above object, according to another aspect of the present invention, a data channel resource mapping method is provided. The data channel resource mapping method according to the present invention includes: dividing the available subcarriers in the region where the data channel is located into n physical resource units; performing a permutation operation on the n physical resource units, wherein the permutation operation is performed in units of n1 physical resource units The number of frequency partitions of the data channel and the number of n physical resource units in each frequency partition are sequentially selected from the n physical resource units after the permutation operation, and the number is equal to nl physical resource units in each frequency partition. The physical resource unit is allocated to each frequency partition; the physical resource units allocated to each frequency partition in units of n1 physical resource units are all mapped into centralized resource units, wherein the subcarriers in the centralized resource unit are continuous, n And nl is an integer greater than or equal to 1, and n is greater than or equal to nl. Further, the area includes one of the following: a frame, a sub-frame, a frequency partition, wherein, the frequency A partition is a resource area that contains multiple resource units. Further, the method further includes: allocating physical resource units remaining after the allocation operation to each frequency partition in units of n2 physical resource units; mapping physical resource units allocated to each frequency partition in units of n2 to centralized resource units Or a distributed resource unit, where the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, where L>=2, n2 is an integer greater than or equal to 1, and JL n2 is less than or equal to n, nl. Further, the method further includes: the subcarriers in the n1 or n2 physical resource units are consecutive. Further, after dividing the available subcarriers in the area where the data channel is located into n physical resource units, the method further includes: retaining resources for enhanced multicast service EMBS transmission and/or multiple input multiple output open loop MIMO OL transmission. Further, the number of data channel frequency partitions, the number of physical resource units in units of n1 physical resource units in each frequency partition, and the physical resource units allocated to each frequency partition in units of n2 physical resource units are mapped to centralized The number of resource units or distributed resource units, reserved information reserved for enhanced multicast service EMBS transmission and/or multiple input multiple output open loop (MIMO OL) transmission indication information carried by broadcast control information transmitted on the broadcast control channel . Further, the permutation operation uses one or a combination of the following: row and column permutation, circular permutation mapping, uniform decimation permutation, specific sequence permutation, and random permutation. In order to achieve the above object, according to still another aspect of the present invention, a broadcast control channel resource mapping apparatus is provided. The broadcast control channel resource mapping apparatus according to the present invention includes: an allocation module, configured to divide part or all of the available subcarriers of the area where the broadcast control channel is located into n physical resource units, wherein a part of the subcarriers occupy a bandwidth greater than or equal to a minimum system a mapping module, configured to map n physical resource units into distributed resource units, where subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2„ To achieve the above purpose, According to still another aspect of the present invention, a data channel resource mapping apparatus is provided. The data channel resource mapping apparatus according to the present invention includes: a dividing module, configured to use a data channel The available subcarriers in the area are divided into n physical resource units; the permutation module is used to perform the permutation operation on the n physical resource units, where the permutation operation is in units of nl physical resource units; the first allocation module is used for The number of frequency partitions of the data channel and the number of physical resource units in n1 physical resource units in each frequency partition are allocated to the frequency partitions by the n physical resource units after the replacement operation; the first mapping module is used to The physical resource units allocated to the respective frequency partitions by the n1 physical resource units are all mapped to the centralized resource unit, where n, nl are integers greater than or equal to 1, and n is greater than or equal to nl. Further, the method further includes: a second allocation module, configured to allocate, by using n2 physical resource units, physical resource units remaining after the allocation operation to each frequency partition; and a second mapping module, configured to allocate in units of n2 The physical resource units to each frequency partition are mapped to a centralized resource unit or a distributed resource unit, where the subcarriers in the centralized resource unit are continuous, and the subcarriers in the distributed resource unit are discontinuous or each L sub-carriers The carrier is continuous, L>=2, where n2 is an integer greater than or equal to 1, and n2 is less than or equal to n, nl; a reserved module for retaining enhanced EMBS transmission and/or multiple input multiple output common region MIMO OL The resources transferred. According to the present invention, some or all of the available subcarriers in the area where the broadcast control channel is located are divided into n physical resource units, wherein a part of the subcarriers occupy a bandwidth greater than or equal to a minimum system bandwidth; and n physical resource units are mapped into a distribution. The scheme of the resource unit and the like solves the problem that the resource mapping process based on the time slot or the codeword is a resource unit in the related art cannot meet the requirement of the broadcast control channel and the data channel in the OFDMA system, thereby improving the radio resource scheduling. The flexibility to ensure the frequency efficiency of multi-carrier systems. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a frame structure of a wireless communication system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a resource structure of a wireless communication system according to an embodiment of the present invention; and FIG. 3 is a broadcast control according to an embodiment of the present invention. A flowchart of a channel resource mapping method; FIG. 4 is a schematic diagram of a broadcast control channel resource mapping of an OFDMA system according to an embodiment of the present invention; 5 is a flowchart of a data channel resource mapping method according to an embodiment of the present invention; FIG. 6 is a schematic diagram of data channel resource mapping of an OFDMA system according to an embodiment of the present invention; FIG. 7 is a broadcast control channel according to an embodiment of the present invention. FIG. 8 is a block diagram showing the structure of a data channel resource mapping apparatus according to an embodiment of the present invention; and FIG. 9 is a block diagram showing a preferred structure of a data channel resource mapping apparatus according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Before describing an embodiment of the present invention, a resource mapping process of the OFDMA technique is first described briefly. It should be noted that although the OFDMA technology is taken as an example for description in the embodiment of the present invention, the present invention is not limited thereto, and a multi-carrier system such as a Long Term Evolution (LTE) system and the future The invention can also be applied to other multi-carrier systems that may occur. In addition, the distributed resource unit and the centralized resource unit are logical resource units unless otherwise specified. The base station informs the terminal of the physical location of the data transmitted and/or received by the index of the logical resource unit. In a wireless communication system based on OFDMA technology, a resource mapping process can be understood as a process of mapping physical resources (such as physical subcarriers) into logical resources, for example, mapping physical subcarriers into logical resource blocks, so that the base station passes scheduling logic. The resource block implements scheduling of radio resources. The main basis of resource mapping is the frame structure and resource structure of the OFDMA system. In the frame structure, radio resources are divided into different levels of units in the time domain for scheduling, for example, into a super frame, a frame, a subframe, and a symbol. For example, as shown in FIG. 1, the radio resource is divided into super frames in the time domain, each super frame includes F frames, and each frame further includes K sub-frames, and the sub-frame is composed of S basic OFDMA symbols, actually The system determines how many OFDMA symbols are included in each level unit in the frame structure according to factors such as the speed, rate, and service type of the terminal to be supported. The resource structure is supported in the frequency domain according to the coverage required, the speed, rate and service of the terminal. ^ ¹ type and other factors available frequency band into a plurality of frequency partitions (Frequency Partition), ^a further frequency ^ frequency resource partition into localized resource region and / or a distributed resource region scheduling. As shown in FIG. 2, the available physical subcarriers of one subframe are divided into physical resource units, and then, after one replacement, the replaced resource units are respectively allocated to each frequency partition with the granularity of n1 and n2, for example, divided into three frequencies. The partition is used to support three cells, and each frequency partition is divided into centralized resources and/or distributed resources to implement scheduling flexibility. In the following embodiments, unless otherwise specified, n, n1, and n2 are integers greater than or equal to 1, and n is greater than or equal to n1, n2. In addition, in the permutation operation mentioned in the embodiment of the present invention, the permutation method according to the permutation length may include, but is not limited to, one of the following or a combination thereof: row and column permutation, circle permutation mapping, uniform tick extraction, and specific sequence permutation. And random replacement. For example, £ sets the original sequence to [0,1,2,3,4,5,6,7,8,9,10,11], and the replacement length is 12. If the row and column are replaced, the permutation matrix is [0] , 1, 2, 3; 4, 5, 6, 7; 8, 9, 10, 11], then the sequence after the replacement is [0, 4, 8, 1, 5, 9, 2, 6, 10, 3 , 7, 11], if the 序列 is replaced by a specific sequence, the permutation sequence [0, 6, 3, 10, 7, 4, 1, 11, 8, 2, 5, 9] is the sequence order after the substitution. In principle, some variants based on rank-and-column substitution are still row-column permutations. For example, the original sequence is [0,1,2,3,4], and the sequence after replacement is: 0, 3, 1, 4, 2, the essence is still It is a row and column permutation, that is, the first five of [0, 1, 2; 3, 4, 5]. The preferred embodiments of the present invention are described in the following with reference to the accompanying drawings, which are intended to illustrate and illustrate the invention. Embodiment 1 FIG. 3 is a flowchart of a broadcast control channel resource mapping method according to an embodiment of the present invention, as shown in the following figure.

As shown in FIG. 3, the following steps are included: Step S302: Part or all of the available subcarriers in the area where the broadcast control channel is located are divided into n physical resource units, where a part of the subcarriers occupy a bandwidth greater than or equal to a minimum system bandwidth. Step S304, mapping n physical resource units into distributed resource units, where the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2. In the related art, since the resource mapping process based on the time slot or the codeword is a resource unit cannot satisfy the requirement of the broadcast control channel in the OFDMA system, in the embodiment of the present invention, part or all of the area where the broadcast control channel is located The available subcarriers are divided into n physical resource units, and the n physical resource units are mapped into distributed resource units, which improves the frequency efficiency of the system. Preferably, the foregoing area includes one of the following: a subframe, a frequency partition, where the frequency partition refers to a resource region that includes multiple resource units. Preferably, n physical resource units are mapped to distributed logical resource units by subcarrier replacement. The preferred embodiment maps physical resource units to distributed logical resource units by subcarrier permutation, which improves the flexibility of broadcast control channel scheduling. Preferably, the above subcarrier replacement operation is related to a cell ID carried in the synchronization channel. The preferred embodiment improves the coverage of the broadcast control channel cell by associating the subcarrier permutation with the cell ID. Preferably, the subcarrier permutation operation uses one or a combination of the following: row and column permutation, circular permutation mapping, singular decimation permutation, specific sequence permutation, and random permutation. The specific replacement method can be determined according to the length of the replacement or the number of units to be replaced. For example, the subcarrier replacement operation is performed by uniform decimation replacement. When the permutation operation is performed, the physical resource units are extracted from the n physical resource units at intervals of n1 physical resource units. Example 1 This preferred embodiment provides a broadcast control channel resource mapping method for a wireless communication system. 4 is a schematic diagram of a broadcast control channel resource mapping of an OFDMA system according to an embodiment of the present invention. As shown in FIG. 4, the resource mapping process of FIG. 4 is described as follows: The resource mapping of the area where the broadcast control channel is located is predefined. Or fixed, for example, the resource mapping of the subframe 0 in which it is located. The available subcarriers in the area where the broadcast control channel is located are divided into n physical resource units, for example, n=24, and after subcarrier replacement, all are replaced by distributed resource units, and the terminal determines the broadcast control channel occupation according to the prior replacement rules and operation steps. Logical resources and physical resource locations. Preferably, in order to guarantee coverage for multiple cells, the permutation process is related to 'j, zone identity or ID. For example, a permutation sequence is required during the permutation process, and the cell identification or ID information is required to replace the sequence itself or to generate a permutation sequence. The information required for the broadcast control channel resource mapping is carried only in the synchronization channel. The preferred embodiment implements mapping of broadcast control channel resources. Embodiment 2 FIG. 5 is a flowchart of a data channel resource mapping method according to an embodiment of the present invention. As shown in FIG. 5, the method includes the following steps: Step S502: The available subcarriers in the area where the data channel is located are divided into n physical resource units. Step S504, performing a replacement operation on the n physical resource units, where the replacement operation is performed in units of n1 physical resource units. Step S506, the number of frequency partitions of the data channel and the number of physical resource units in units of n1 physical resource units in each frequency partition are allocated to the frequency partitions by the n physical resource units after the replacement operation. Step S508, the physical resource units allocated to the respective frequency partitions in units of n1 physical resource units are all mapped into centralized resource units, wherein the subcarriers in the centralized resource unit are continuous, and n and nl are greater than or equal to An integer of 1, JL n is greater than or equal to nl. In the related art, the resource mapping process based on the time slot or the codeword is not able to meet the requirements of the data channel in the OFDMA system. In the embodiment of the present invention, the available subcarriers in the area where the data channel is located are divided into n physical resource units, and performing permutation operations on n physical resource units, wherein the permutation operation is performed in units of n1 physical resource units, and the number of data channel frequency partitions and the frequency partition are in units of nl physical resource units. The number of physical resource units allocates n physical resource units after the replacement operation to the frequency partition, and all the physical resource units allocated to the frequency partition in units of n1 physical resource units are all mapped into centralized resource units, thus ensuring the data channel. It can carry a larger amount of data and improve frequency utilization. It should be noted that the data channel resource mapping method is applicable to resource mapping of an uplink data channel and resource mapping of a downlink data channel. When the resource mapping of the uplink data channel is performed, the resource elements in the frequency partition are mapped to distributed resource units by sub-blocks or slots, and the sub-blocks or slots are resource blocks smaller than physical resource units, one A physical resource unit contains multiple sub-blocks or time slots. Preferably, the foregoing area includes one of the following: a frame, a subframe, and a frequency partition, where the frequency partition refers to a resource region that includes multiple resource units, and the foregoing region does not include a broadcast control channel. It should be noted that the foregoing area does not include a broadcast control channel. Preferably, n2 physical resource units ¹ ^ remaining after dispensing operation of the dispensing unit to the respective physical resource partitions frequency; n2 will be allocated in units of the physical resources to each frequency partition The source unit is mapped to a centralized resource unit or a distributed resource unit, where the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, where L>=2, n2 is an integer greater than or equal to 1, and N2 is less than or equal to n, nl. The preferred embodiment allocates the remaining frequency resources after the first allocation to the frequency partitions according to requirements, and maps the resources into centralized resource units or distributed resource units, so that the base station selects an appropriate resource scheduling granularity according to scheduling requirements, and improves The flexibility of wireless resource scheduling. Preferably, after dividing the available subcarriers in the area where the data channel is located into n physical resource units, the method further includes: reserved for enhanced multicast service (EMBS) transmission and/or multiple input multiple output open loop (MIMO OL) The resources transferred. The preferred embodiment implements retention of common resources and improves the rationality of resource scheduling. Preferably, the number of data channel frequency partitions, the number of physical resource units in n1 physical resource units in each frequency partition, and the physical resource units allocated to each frequency partition in units of n2 physical resource units are mapped to centralized The number of resource units or distributed resource units, reserved information reserved for enhanced multicast service EMBS transmission and/or multiple input multiple output open loop (MIMO OL) transmission indication information carried by broadcast control information transmitted on the broadcast control channel The preferred embodiment implements bearer of information in the resource mapping process. Preferably, the permutation operation uses one or a combination of the following: row and column permutation, circular permutation mapping, uniform decimation permutation, specific sequence permutation, and random permutation. The specific replacement method can be determined according to the length of the replacement or the number of units to be replaced. For example, the subcarrier replacement operation is performed by uniform decimation replacement. When the permutation operation is performed, physical resource units are extracted from the remaining physical resource units at intervals of n2 physical resource units. In the embodiment of the present invention, preferably, n1>n2, it can ensure that all physical resource units are consecutive when the replacement is performed in units of n1 physical resource units, and the subsequent allocation is performed in units of n2 physical resource units. There are no restrictions. Embodiments of the present invention are further described below in conjunction with application examples. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. Example 2 This preferred embodiment provides a data channel resource mapping method for a wireless communication system. Figure 6 is based on The data channel resource mapping diagram of the OFDMA system in the embodiment of the present invention, as shown in FIG. 6, can be implemented by: performing broadcast control information on a broadcast control channel, including at least one or a combination of the following: resource mapping of the downlink data channel Whether the number of physical resource units in nl units in each frequency partition in the frequency partition of the resource mapping of the uplink data channel, the resource mapping of the downlink data channel, and the resource mapping of the uplink data channel are allocated to each in units of n2 The physical resource units of the frequency partition are all mapped to a centralized resource unit/or a distributed resource unit, and whether predetermined resources are reserved for EMBS transmission or MIMO OL transmission and quantity in a specific frequency partition. For example, the specific frequency partition is frequency partition 0, and 2 bits are set to indicate whether to reserve resources for EMBS transmission or MIMO OL transmission or to enable EMBS transmission or MIMO OL transmission. When not reserved or not, the available subcarriers are divided into n physical resource units, and the n physical resource units are replaced, where the replacement operation is performed in units of n1 physical resource units, and is independent of the cell ID; Partial resource units in the replaced physical resource unit are allocated to each frequency partition according to the number of frequency partitions and the number of physical resource units in n1 in each partition, and the remaining physical resource units are partitioned according to frequency The number and the number of physical resource units in n2 in each partition are allocated to the respective frequency partitions in accordance with the number of frequency partitions. If the EMBS transmission and/or the MIMO OL transmission is enabled, the number of resource units reserved for the EMBS transmission and/or the MIMO OL transmission needs to be reserved from the n physical resource units before the resource mapping is performed. The quantity, then the resource mapping of the data channel for the remaining physical resource units. Within each frequency partition, physical resource units allocated to each frequency partition in units of n1 are all mapped as centralized resource units; physical resource units allocated to each frequency partition in units of n2 are all mapped to centralized resource units or distributed. Resource unit. For example, as shown in FIG. 6, 24 physical resource units are replaced by n1 physical resource units, for example, nl=4; When row-column replacement is used, the order after replacement is [0, 2, 4, 1 . 3, 5], and the resource mapping of the resource mapping data channel of the downlink data channel is: The number of physical resource units in the frequency partition 0 in units of n1 is 2, and the frequency partitions 1, 2, 3 are in units of nl The number of physical resource units is 0, that is, the 8 resource units of the physical resource unit [0, 1, 2, 3, 12, 13, 14, 15] are directly allocated to the frequency partition 0, and the other 16 resource units are partitioned according to the frequency. The number is evenly distributed to each frequency partition. It should be noted that, in the preferred embodiment, all the remaining resources are allocated to each frequency partition, and those skilled in the art should understand that the remaining resources may also use one or a combination of the following according to the replacement length: row and column replacement , circular permutation mapping, uniform decimation permutation, specific sequence permutation, and random permutation are assigned to frequency partitions. Since the above replacement is still independent of the cell ID, specific functions can be ensured. For example, different cells can reserve the same physical resources to support consistent operations such as EMBS and MIMO OL. Preferably, for the frequency partition, a binary bit equal to the current frequency partition number or the maximum frequency partition number may be set to indicate whether the resource unit with the granularity of n2 in each frequency partition is mapped to a distributed resource unit. The preferred embodiment implements mapping of data channel resources. FIG. 7 is a structural block diagram of a broadcast control channel resource mapping apparatus according to an embodiment of the present invention. The apparatus includes: an allocation module 72 and a mapping module 74. The foregoing structure is described in detail. An allocation module 72 is configured to broadcast a control channel. A part or all of the available subcarriers are divided into n physical resource units, wherein a part of the subcarriers occupy a bandwidth greater than or equal to a minimum system bandwidth; a mapping module 74 is connected to the allocation module 72, and is configured to allocate the allocation module 72. The physical resource units are mapped to distributed resource units, where the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2. In the related art, the resource mapping process based on the time slot or the codeword is not able to meet the requirements of the broadcast control channel in the OFDMA system. In the embodiment of the present invention, the area where the broadcast control channel is located is allocated by the allocation module 72. Part or all of the available subcarriers are divided into n physical resource units, and the mapping module 74 maps the n physical resource units into distributed resource units, thereby improving the frequency efficiency of the system. FIG. 8 is a structural block diagram of a data channel resource mapping apparatus according to an embodiment of the present invention. The apparatus includes: a dividing module 82, a permutation module 84, a first allocating module 86, and a first mapping module 88. The foregoing structure is described in detail below. The dividing module 82 is configured to divide the available subcarriers in the area where the data channel is located into n physical resource units; the replacing module 84 is connected to the dividing module 82, and is configured to perform the replacing operation on the n physical resource units divided by the dividing module 82. The replacement operation is performed in units of n1 physical resource units; the first allocation module 86 is connected to the replacement module 84, and is configured to use the number of frequency partitions of the data channel and the n1 physical resource units in each frequency partition. The number of units of physical resource units The n physical resource units replaced by the replacement module 84 are allocated to the frequency partition; the first mapping module 88 is connected to the first allocation module 86, and is configured to allocate the first allocation module 86 to n1 physical resource units. The physical resource units of the frequency partition are all mapped to a centralized resource unit, where n, nl are integers greater than or equal to 1, and n is greater than or equal to nl. In the related art, since the resource mapping process based on the time slot or the codeword is not satisfied by the data channel in the OFDMA system, in the embodiment of the present invention, the available sub-area of the data channel is located by the dividing module 82. The carrier is divided into n physical resource units, and the permutation module 84 performs a permutation operation on the n physical resource units. The permutation operation is performed in units of n1 physical resource units, and the first allocation module 86 partitions according to the number and frequency of the data channel frequency partition. The number of physical resource units in units of n1 physical resource units is allocated to the frequency partitions by the n physical resource units after the replacement operation, and the first mapping module 88 allocates the physical units of the frequency partitions in units of n1 physical resource units. All resource units are mapped to centralized resource units, which ensures that the data channel can carry a larger amount of data and improve frequency utilization. FIG. 9 is a block diagram of a preferred structure of a data channel resource mapping apparatus according to an embodiment of the present invention. The apparatus further includes: a second allocation module 92, a second mapping module 94, and a reservation module 96. The foregoing structure is described in detail below: The second allocation module 92 is connected to the first allocation module 86, and is configured to allocate the remaining physical resource units to the respective frequency partitions after the allocation operation by the first allocation module 86 in units of n2 physical resource units; the second mapping module 94. The second resource allocation unit 92 is configured to map the physical resource unit allocated to each frequency partition by the second allocation module 92 in units of n2 to a centralized resource unit or a distributed resource unit, where the centralized resource unit is The subcarriers are continuous, the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2, where n2 is an integer greater than or equal to 1, and n2 is less than or equal to n, nl A reservation module 96 is coupled to the first mapping module 88 for retaining resources of the enhanced EMBS transmission and/or the multiple input multiple output common area MIMO OL transmission. In summary, the present invention standardizes the frequency resource mapping process based on the OFDMA broadcast control channel and the data channel, so that the base station selects an appropriate resource scheduling granularity according to scheduling requirements, obtains a frequency selection gain and a frequency diversity gain, and ensures radio resource scheduling. Flexibility to ensure frequency efficiency of multi-carrier systems. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for mapping a broadcast control channel resource, comprising:

Part or all of the available subcarriers in the area where the broadcast control channel is located are divided into n physical resource units, where the bandwidth occupied by the partial subcarriers is greater than or equal to the minimum system bandwidth; mapping the n physical resource units into distributed resources a unit, where the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2.

The method according to claim 1, wherein the area is one of the following: a subframe, a frequency partition, where the frequency partition refers to a resource region that includes multiple resource units.

The method according to claim 1, wherein the n physical resource units are mapped to distributed logical resource units by subcarrier replacement.

The method according to claim 3, wherein the subcarrier replacement operation is related to a cell identity ID carried in a synchronization channel.

The method according to claim 3, wherein the subcarrier replacement operation uses one or a combination of the following: row and column permutation, circular permutation mapping, uniform decimation permutation, specific sequence replacement, and random permutation.

A method for mapping a data channel resource, comprising:

And dividing the available subcarriers in the area where the data channel is located into n physical resource units; performing a permutation operation on the n physical resource units, where the permutation operation is performed in units of n1 physical resource units;

And the number of frequency partitions according to the data channel and the number of n1 physical resource units in each of the frequency partitions are sequentially selected from the n physical resource units after the replacement operation, and the number is equal to each frequency partition. Physical resource units in units of n1 physical resource units are allocated to the respective frequency partitions;

All the physical resource units allocated to each of the frequency partitions in units of n1 physical resource units are all mapped into a centralized resource unit, wherein the subcarriers in the centralized resource unit are continuous, n and nl are An integer greater than or equal to 1, and n is greater than or equal to nl.

The method according to claim 6, wherein the area includes one of: a frame, a subframe, and a frequency partition, where the frequency partition refers to a resource area that includes multiple resource units.

8. The method according to claim 6, further comprising:

All the physical resource units remaining after the allocation operation are allocated to each of the frequency partitions in units of n2 physical resource units;

The physical resource unit allocated to each of the frequency partitions in units of n2 is mapped to the centralized resource unit or the distributed resource unit, where the subcarriers in the distributed resource unit are discontinuous or per L subcarriers Continuous, where L>=2, n2 is an integer greater than or equal to 1, and JL n2 is less than or equal to n, nl.

The method according to claim 6 or 8, further comprising:

The subcarriers in the nl or n2 physical resource units are continuous.

The method of claim 6, wherein after the available subcarriers in the area where the data channel is located are divided into n physical resource units, the method further includes:

Reserve resources for enhanced multicast services EMBS transmission and/or multiple input multiple output open loop MIMO OL transmission.

The method according to claim 10, wherein the number of the data channel frequency partitions, the number of physical resource units in the respective frequency partitions in units of n1 physical resource units, and n2 physical resources The unit is a unit that allocates physical resource units allocated to each of the frequency partitions to a centralized resource unit or a number of distributed resource units, and reserves predetermined resources for enhanced multicast service EMBS transmission and/or multiple input multiple output open loop MIMO. The indication information of the OL transmission is carried by the broadcast control information transmitted on the broadcast control channel.

12. The method according to claim 6, wherein the permutation operation uses one or a combination of the following: a row and column permutation, a circle permutation map, a decimation and permutation permutation, a specific sequence permutation, and a random permutation.

A broadcast control channel resource mapping apparatus, comprising:

An allocation module, configured to divide part or all of the available subcarriers of the area where the broadcast control channel is located into n physical resource units, where the bandwidth occupied by the part of the subcarriers is greater than or equal to the minimum system bandwidth; a mapping module, configured to map the n physical resource units into distributed resource units, where the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2.

A data channel resource mapping device, comprising:

a dividing module, configured to divide available subcarriers in a region where the data channel is located into n physical resource units;

a replacement module, configured to perform a replacement operation on the n physical resource units, where the replacement operation is performed in units of n1 physical resource units;

a first allocation module, configured to: according to the number of frequency partitions of the data channel and the number of the physical resource units in units of n1 physical resource units in each of the frequency partitions, the n after the replacement operation Physical resource units are allocated to the frequency partition;

a first mapping module, configured to map all the physical resource units allocated to each of the frequency partitions in units of n1 physical resource units into a centralized resource unit, where n, nl are integers greater than or equal to 1, And n is greater than or equal to nl.

The device according to claim 14, further comprising:

a second allocation module, configured to allocate the remaining physical resource units after the allocation operation to each of the frequency partitions in units of n2 physical resource units;

a second mapping module, configured to map the physical resource unit allocated to each of the frequency partitions in units of _n 2 to the centralized resource unit or the distributed resource unit, where the centralized resource unit The subcarriers are continuous, and the subcarriers in the distributed resource unit are discontinuous or continuous per L subcarriers, L>=2, where n2 is an integer greater than or equal to 1, and JL n2 is less than or equal to n. Nl ;

A reserved module that reserves resources for enhanced EMBS transmission and/or multiple input multiple output common area MIMO OL transmission.