Code distribution method, apparatus and system for ascending control signal channel
A technology for control channel and code allocation, applied in the field of wireless communication, can solve the problem of destroying the orthogonality between blocks, and achieve the effect of reducing the interference between blocks and satisfying the orthogonality between blocks
Active Publication Date: 2012-12-26
HUAWEI TECH CO LTD
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However, for channels with different spreading codes between blocks, the above-mentioned hopping destroys the inter-block orthogonality of the above-mentioned channels on one slot while randomizing the interference between intra-block cyclic shifts
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[0039] In order to make the technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.
[0040] The code distribution method of an uplink control channel of the present invention is as follows Figure 4 As shown, the uplink control channel is hereinafter referred to as the control channel for short, and the specific steps are as follows:
[0041] Step 101: Assign intra-block cyclic shift and inter-block spreading codes to the control channel;
[0042] In all control channel distribution methods, due to the high-speed movement of user terminals, the intra-block cyclic shift interval is 1, hereinafter referred to as adjacent control channels. The inter-block cyclic shift caused by the influence of multipath delay The interference is greater than the interference where the cyclic shift interval in the block is greater than 1. Therefore, the control ch...
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This invention is related to the mobile communication filed, disclosing a method of code distribution of up control channel which is capable of randomly controlling interference in blocks among channels. The method of code distribution of up control channel includes following steps: assigning a cyclic shift in block and an extending code among blocks to the control channel; setting a jumping on at least one block where the extending code among blocks acts to the cyclic shift in block assigned by control channel in a time slot so as to differently distribute the control channels on at least two blocks; setting the distributions of control channels on at least two blocks where the extending code among blocks acts in a time slot to be the same or integral shift based on the orthogonal property of the extending code among blocks, wherein the orthogonal property indicates that the extending code among blocks of two control channels is satisfied with the orthogonality on the mark when composing a certain part of the extending code.
Description
Technical field [0001] The present invention relates to the field of wireless communication, and in particular to a code allocation technology for an uplink control channel in Orthogonal Frequency Division Multiplexing (OFDM for short). Background technique [0002] In the existing OFDM / OFDMA wireless communication system, the base station allocates or reserves one or more common time-frequency resources for the uplink control channels of multiple user terminals. In a time segment (for example, a time slot), uplink control channels of multiple user terminals can be code-division multiplexed on a common time-frequency resource, and the uplink control channels of these different user terminals are distinguished by different codes. [0003] figure 1 It is a schematic diagram of the time-frequency resource structure of the uplink control channel. Among them, a time slot can be divided into several blocks in time (a block usually contains an OFDM symbol), some blocks are used to transmi...
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IPC IPC(8): H04L5/00H04J13/16H04L27/26
Inventor 王向华
Owner HUAWEI TECH CO LTD