E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and device therefor

A technology of resource mapping and time-frequency resources, applied in the field of resource mapping of E-PDCCH, to achieve the effect of flexible resource allocation scheme, full utilization, and improved transmission efficiency

Active Publication Date: 2012-10-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The embodiment of the present invention provides an E-PDCCH resource mapping method and device, which are used to

Method used

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  • E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and device therefor
  • E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and device therefor
  • E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and device therefor

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Example Embodiment

[0083] In the first embodiment, the four PRB pairs all support the localized transmission mode, and the base station selects two of them for E-PDCCH transmission.

[0084] Correspondingly, based on the above scenario description, in this embodiment, the PRB pair selected by the base station for transmitting the E-PDCCH to the terminal device may be Figure 8 In (PRB pair 0, PRB pair 1), or (PRB pair 1, PRB pair 2), or (PRB pair 2, PRB pair 3).

[0085] Assuming that the configuration of the OFDM symbols occupied by the legacy PDCCH is considered in the system (the RE occupied by the legacy PDCCH will not be used for E-PDCCH transmission), a PRB pair can contain 19 E-REGs.

[0086] Set each E-REG to be composed of 4 REs, and each E-CCE to be composed of 9 E-REGs.

[0087] Then Figure 8 In (PRB pair 0, PRB pair 1) as an example, such as Picture 9 As shown, it is a schematic diagram of E-CCE and E-REG resource mapping proposed in Embodiment 1 of the present invention, where each E-REG i...

Example Embodiment

[0091] In the second embodiment, the four PRB pairs all support the localized transmission mode, and the base station selects three of them for E-PDCCH transmission.

[0092] Correspondingly, based on the above scenario description, in this embodiment, the PRB pair selected by the base station for transmitting the E-PDCCH to the terminal device may be Figure 8 (PRB pair 0, PRB pair 1, PRB pair 2), or (PRB pair 1, PRB pair 2, PRB pair 3).

[0093] Assuming that the configuration of the OFDM symbols occupied by the legacy PDCCH is considered in the system (the RE occupied by the legacy PDCCH will not be used for E-PDCCH transmission), a PRB pair can contain 19 E-REGs.

[0094] Similarly, each E-REG is set to be composed of 4 REs, and each E-CCE is composed of 9 E-REGs.

[0095] Then Figure 8 In (PRB pair 0, PRB pair 1, PRB pair 2) as an example, such as Picture 10 As shown, it is a schematic diagram of E-CCE and E-REG resource mapping proposed in Embodiment 2 of the present invention,...

Example Embodiment

[0100] In the third embodiment, among the four PRB pairs, PRB pair 0 and PRB pair 2 support the localized transmission mode, while PRB pair 1 and PRB pair 3 support the distributed transmission mode, and the base station selects 2 of them for E-PDCCH transmission.

[0101] Correspondingly, based on the above scenario description, in this embodiment, the PRB pair selected by the base station for transmitting the E-PDCCH to the terminal device is Figure 8 In (PRB pair 0, PRB pair 2).

[0102] For the corresponding mapping relationship between E-CCE and E-REG, please refer to the description in the foregoing embodiment 1, which will not be repeated here. The difference between this embodiment and the foregoing embodiment 1 is that the PRB pair supports different transmission modes. The difference of the PRB pair selection plan.

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Abstract

The invention discloses an E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and a device for E-PDCCH resource mapping. With the adoption of the technical scheme of the embodiment, in a process of configuring a time-frequency resource (at least two PRB (Physical Resource Block) pairs) for transmitting an E-PDCCH to terminal equipment, the transmission of the E-PDCCH can be carried out in a non-interweaving manner through a control time frequency resource unit (E-CCE (Enhanced-Control Channel Element) formed by a plurality of continuous time frequency resource groups (REGs (Resource Element Groups)), and an E-CCE formed by connecting a plurality of the REGs between the two PRB pairs through adopting a cascaded manner, so that the resource mapping problem of transmission in the non-interweaving manner when one PRB pair contains E-CCEs with the quantity being non-integer is solved, and a resource configuration scheme in an E-PDCCH transmission process is flexible, a system resource is sufficiently utilized and the transmission efficiency of the E-PDCCH is improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an E-PDCCH resource mapping method and device. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) Rel-8 / 9 / 10 system, PDCCH (Physical Downlink Control Channel, physical downlink control channel) is sent in each radio subframe, such as figure 1 As shown, it occupies the first N OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbol transmissions of a subframe, where N may be 1, 2, 3, 4, and N=4 only Allowed to appear in a system with a system bandwidth of 1.4MHz, the first N OFDM symbols are called "traditional PDCCH regions" here. [0003] The control area for transmitting PDCCH in the LTE Rel-8 / 9 / 10 system is composed of logically divided CCEs (Control Channel Elements, Control Channel Elements), where one CCE is composed of 9 REGs (Resource Element Groups, Resource Element Groups) )comp...

Claims

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Application Information

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IPC IPC(8): H04W72/04
Inventor 赵锐潘学明拉盖施张然然
Owner DATANG MOBILE COMM EQUIP CO LTD
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