For SymphonyCMS, provides dynamic pagination-url to Nick Dunn pagination template. It holds the current URL and params while updating the page.

dynamic-paging-url.xsl

<xsl:call-template name="pagination">
  <xsl:with-param name="pagination" select="pagination" />
  <!-- build an url that holds every get params, except the page -->
  <xsl:with-param name="pagination-url">
    <xsl:value-of select="/data/params/root" />
    <xsl:value-of select="/data/params/parent-path" />
    <xsl:text>?</xsl:text>
    <xsl:for-each select="/data/params/*[contains(name(), 'url-')]">
      <xsl:if test="not(name(.) = 'url-page')">
        <xsl:value-of select="concat(substring-after(name(), 'url-'), '=', text())" />
      </xsl:if>
    </xsl:for-each>
    <xsl:text disable-output-escaping="yes">&amp;</xsl:text>
    <xsl:text>page=$</xsl:text>
  </xsl:with-param>
</xsl:call-template>